Barclays ATP World Tour Finals - Day One(01 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan returns ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(02 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan returns ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(03 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan reacts during the singles group B match against Andy Murray of Great Britain on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(04 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan reacts during the singles group B match against Andy Murray of Great Britain on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(05 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan returns ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(06 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan serves ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(07 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan returns ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(08 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 9: Kei Nishikori of Japan returns ball to Andy Murray of Great Britain during the singles group B match on the first day of the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Yunus Kaymaz/Anadolu Agency/Getty Images) (credit:Anadolu Agency via Getty Images)
Barclays ATP World Tour Finals - Day One(09 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Justin Setterfield/Getty Images) (credit:Justin Setterfield via Getty Images)
Barclays ATP World Tour Finals - Day One(10 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Justin Setterfield/Getty Images) (credit:Justin Setterfield via Getty Images)
TENNIS-ATP-FINALS(11 of32)
Open Image ModalJapan\'s Kei Nishikori speaks to a journalist after winning his singles group B match against Britain\'s Andy Murray on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
TENNIS-ATP-FINALS(12 of32)
Open Image ModalJapan\'s Kei Nishikori rests between sets during his singles group B match against Britain\'s Andy Murray on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/GLYN KIRK (Photo credit should read GLYN KIRK/AFP/Getty Images) (credit:GLYN KIRK via Getty Images)
Barclays ATP World Tour Finals - Day One(13 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Justin Setterfield/Getty Images) (credit:Justin Setterfield via Getty Images)
Barclays ATP World Tour Finals - Day One(14 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan reacts in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
Barclays ATP World Tour Finals - Day One(15 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
Barclays ATP World Tour Finals - Day One(16 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
Barclays ATP World Tour Finals - Day One(17 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan in action in his match against Andy Murray of Great Britain in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Julian Finney/Getty Images) (credit:Julian Finney via Getty Images)
TENNIS-ATP-FINALS(18 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/GLYN KIRK (Photo credit should read GLYN KIRK/AFP/Getty Images) (credit:GLYN KIRK via Getty Images)
TENNIS-ATP-FINALS(19 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/GLYN KIRK (Photo credit should read GLYN KIRK/AFP/Getty Images) (credit:GLYN KIRK via Getty Images)
TENNIS-ATP-FINALS(20 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
TENNIS-ATP-FINALS(21 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
TENNIS-ATP-FINALS(22 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
TENNIS-ATP-FINALS(23 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
Barclays ATP World Tour Finals - Day One(24 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan serves against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
TENNIS-ATP-FINALS(25 of32)
Open Image ModalJapan\'s Kei Nishikori returns to Britain\'s Andy Murray during the singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images) (credit:LEON NEAL via Getty Images)
Barclays ATP World Tour Finals - Day One(26 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan plays a forehand against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
Barclays ATP World Tour Finals - Day One(27 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan plays a forehand against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
Barclays ATP World Tour Finals - Day One(28 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan serves against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
Barclays ATP World Tour Finals - Day One(29 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan serves against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
Barclays ATP World Tour Finals - Day One(30 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan celebrates match point after his straight sets victory against Andy Murray during their round robin match during the Barclays ATP World Tour Finals at the O2 Arena on November 9, 2014 in London, England. (Photo by Clive Brunskill/Getty Images) (credit:Clive Brunskill via Getty Images)
TENNIS-ATP-FINALS(31 of32)
Open Image ModalJapan\'s Kei Nishikori (R) shakes hands with Britain\'s Andy Murray after winning their singles group B match on the first day of the ATP World Tour Finals tennis tournament in London on November 9, 2014. AFP PHOTO/GLYN KIRK (Photo credit should read GLYN KIRK/AFP/Getty Images) (credit:GLYN KIRK via Getty Images)
Barclays ATP World Tour Finals - Day One(32 of32)
Open Image ModalLONDON, ENGLAND - NOVEMBER 09: Kei Nishikori of Japan waves to the crowd after beating Andy Murray of Great Britain 2-0 in the round robin during day one of the Barclays ATP World Tour Finals tennis at O2 Arena on November 9, 2014 in London, England. (Photo by Justin Setterfield/Getty Images) (credit:Justin Setterfield via Getty Images)