TEN-US OPEN-DJOKOVIC-NISHIKORI(01 of56)
Open Image ModalKei Nishikori of Japan celebrates his win over Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. Nishikori stunned Djokovic 6-4, 1-6, 7-6 (7/4) 6-3 at the US Open on Saturday to become the first Asian man to reach a Grand Slam final. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(02 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(03 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(04 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(05 of56)
Open Image ModalKei Nishikori of Japan celebrates his win over Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. Nishikori stunned Djokovic 6-4, 1-6, 7-6 (7/4) 6-3 at the US Open on Saturday to become the first Asian man to reach a Grand Slam final. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(06 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(07 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan greats Novak Djokovic (L) of Serbia after their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(08 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(09 of56)
Open Image ModalKei Nishikori of Japan celebrates his victory over Novak Djokovic of Serbia during their US Open 2014 men\'s singles semifinals match at the USTA Billie Jean King National Center September 6, 2014 in New York. Nishikori stunned Djokovic 6-4, 1-6, 7-6 (7/4) 6-3 at the US Open on Saturday to become the first Asian man to reach a Grand Slam final. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:TIMOTHY A. CLARY via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(10 of56)
Open Image ModalKei Nishikori of Japan celebrates his win over Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(11 of56)
Open Image ModalKei Nishikori of Japan (R) shakes Novak Djokovic of Serbia (L) after Nishikori won during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(12 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia sits down during a change over against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images) (credit:Al Bello via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(13 of56)
Open Image ModalKei Nishikori of Japan (R) and Novak Djokovic of Serbia (L) embrace after Nishikori won during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(14 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Mike Stobe/Getty Images for USTA) (credit:Mike Stobe via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(15 of56)
Open Image ModalKei Nishikori of Japan returns a shot to Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(16 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan serves against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images) (credit:Elsa via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(17 of56)
Open Image ModalKei Nishikori of Japan returns a shot to Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(18 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia returns a shot against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(19 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia serves against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images) (credit:Elsa via Getty Images)
2014 US Open - Day 13(20 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan returns a shot against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(21 of56)
Open Image ModalKei Nishikori of Japan serves to Novak Djokovic of Serbia during their US Open 2014 men\'s singles semifinals match at the USTA Billie Jean King National Center September 6, 2014 in New York. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:TIMOTHY A. CLARY via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(22 of56)
Open Image ModalNovak Djokovic of Serbia hits a return to Kei Nishikori of Japan during their US Open 2014 men\'s singles semifinals match at the USTA Billie Jean King National Center September 6, 2014 in New York. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:TIMOTHY A. CLARY via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(23 of56)
Open Image ModalNovak Djokovic of Serbia serves to Kei Nishikori of Japan during their US Open 2014 men\'s singles semifinals match at the USTA Billie Jean King National Center September 6, 2014 in New York. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:TIMOTHY A. CLARY via Getty Images)
2014 US Open - Day 13(24 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan looks on against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
2014 US Open - Day 13(25 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images) (credit:Elsa via Getty Images)
2014 US Open - Day 13(26 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia reacts against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
2014 US Open - Day 13(27 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan returns a shot against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(28 of56)
Open Image ModalNovak Djokovic of Serbia plays against Kei Nishikori of Japan during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(29 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan sits down during a change over against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(30 of56)
Open Image ModalNovak Djokovic of Serbia puts on a new shirt between sets against Kei Nishikori of Japan during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(31 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images) (credit:Elsa via Getty Images)
2014 US Open - Day 13(32 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia wipes his face while playing against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(33 of56)
Open Image ModalKei Nishikori of Japan reacts to a point while playing against Novak Djokovic of Serbia during their US Open 2014 men\'s singles semifinals match at the USTA Billie Jean King National Center September 6, 2014 in New York. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images) (credit:TIMOTHY A. CLARY via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(34 of56)
Open Image ModalKei Nishikori of Japan reacts to shot against Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(35 of56)
Open Image ModalKei Nishikori of Japan reacts to shot against Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(36 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
2014 US Open - Day 13(37 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images) (credit:Elsa via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(38 of56)
Open Image ModalKei Nishikori of Japan returns a shot to Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(39 of56)
Open Image ModalKei Nishikori of Japan celebrates a point against Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(40 of56)
Open Image ModalKei Nishikori of Japan throws his racquet while playing against Novak Djokovic of Serbia during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(41 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
2014 US Open - Day 13(42 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(43 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan reacts against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(44 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia returns a shot against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
TEN-US OPEN-DJOKOVIC-NISHIKORI(45 of56)
Open Image ModalNovak Djokovic of Serbia celebrates a point against Kei Nishikori of Japan during their 2014 US Open men\'s semifinal singles match at the USTA Billie Jean King National Tennis Center September 6, 2014 in New York. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images) (credit:STAN HONDA via Getty Images)
2014 US Open - Day 13(46 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan returns a shot against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(47 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan changes shirts during a change over against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(48 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia returns a shot against Kei Nishikori of Japan during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Mike Stobe/Getty Images for USTA) (credit:Mike Stobe via Getty Images)
2014 US Open - Day 13(49 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia waves to the crowd after being defeated by Kei Nishikori of Japan in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(50 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan celebrates after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(51 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Kei Nishikori of Japan speaks to the media after defeating Novak Djokovic of Serbia in their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Djokovic in four sets 6-4, 1-6, 7-6, 6-3. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(52 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Coach Michael Chang (R) reacts and Dante Bottini as Kei Nishikori of Japan plays against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(53 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: (L-R) Trainer Koichi Nakano and Agent Hideyuki Sakai watch Kei Nishikori of Japan returns a shot against Novak Djokovic of Serbia during their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(54 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Father Kiyoshi (L) and Mother Eri (R) watch their son Kei Nishikori of Japan play his men\'s singles semifinal match against Novak Djokovic of Serbia on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 13(55 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: Mother Eri Nishikori prepares to watch her son Kei Nishikori of Japan play his men\'s singles semifinal match against Novak Djokovic of Serbia on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
2014 US Open - Day 13(56 of56)
Open Image ModalNEW YORK, NY - SEPTEMBER 06: (L-R) Kei Nishikori of Japan poses with Novak Djokovic of Serbia prior to their men\'s singles semifinal match on Day Thirteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 6, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)