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BIRMINGHAM, ENGLAND - MARCH 06: Kei Nishikori of Japan plays a forehand shot during the singles match against Andy Murray of Great Britain on day three of the Davis Cup World Group first round tie at the Barclaycard Arena on March 6, 2016 in Birmingham, England. (Photo by Clive Brunskill/Getty Images)

BIRMINGHAM, ENGLAND - MARCH 06:  Kei Nishikori of Japan plays a forehand shot during the singles match against Andy Murray of Great Britain on day three of the Davis Cup World Group first round tie at the Barclaycard Arena on March 6, 2016 in Birmingham, England.  (Photo by Clive Brunskill/Getty Images)