TEN-US OPEN-WAWRINKA-NISHIKORI(01 of10)
Open Image ModalKei Nishikori of Japan reacts after winning against Stan Wawrinka of Switzerland during their 2014 US Open Men\'s Singles - Quarterfinals match at the USTA Billie Jean King National Tennis Center September 3, 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 10(02 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori of Japan celebrates after defeating Stan Wawrinka of Switzerland in their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Wawrinka in five sets 3-6, 7-5, 7-6, 6-7, 6-4. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
TEN-US OPEN-WAWRINKA-NISHIKORI(03 of10)
Open Image ModalKei Nishikori of Japan reacts after winning against Stan Wawrinka of Switzerland during their 2014 US Open Men\'s Singles - Quarterfinals match at the USTA Billie Jean King National Tennis Center September 3, 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 10(04 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori of Japan celebrates after defeating Stan Wawrinka of Switzerland in their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Wawrinka in five sets 3-6, 7-5, 7-6, 6-7, 6-4. (Photo by Streeter Lecka/Getty Images) (credit:Streeter Lecka via Getty Images)
2014 US Open - Day 10(05 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori of Japan celebrates after defeating Stan Wawrinka of Switzerland in their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Wawrinka in five sets 3-6, 7-5, 7-6, 6-7, 6-4. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 10(06 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori of Japan celebrates after defeating Stan Wawrinka of Switzerland in their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Wawrinka in five sets 3-6, 7-5, 7-6, 6-7, 6-4. (Photo by Al Bello/Getty Images) (credit:Al Bello via Getty Images)
2014 US Open - Day 10(07 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori (R) of Japan shakes hands with Stan Wawrinka (L) of Switzerland after their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014 in the Flushing neighborhood of the Queens borough of New York City. Nishikori defeated Wawrinka in five sets 3-6, 7-5, 7-6, 6-7, 6-4. (Photo by Matthew Stockman/Getty Images) (credit:Matthew Stockman via Getty Images)
2014 US Open - Day 10(08 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Kei Nishikori of Japan returns a shot against Stan Wawrinka of Switzerland during their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 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-WAWRINKA-NISHIKORI(09 of10)
Open Image ModalStan Wawrinka of Switzerland acknowledges the crowd after losing against Kei Nishikori of Japan in their 2014 US Open Men\'s Singles - Quarterfinals match at the USTA Billie Jean King National Tennis Center September 3, 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 10(10 of10)
Open Image ModalNEW YORK, NY - SEPTEMBER 03: Stan Wawrinka of Switzerland returns a shot against Kei Nishikori of Japan during their men\'s singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 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)