Davis Cup World Group

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Frank Dancevic of Canada reacts after he lost a point against Kei Nishikori of Japan during their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Frank Dancevic, right, of Canada greets Japan's team captain Minoru Ueda, center, and Kei Nishikori after he pulled out of a match against Nishikori due to injuries, at their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Frank Dancevic of Canada reacts before pulling out of a match against Kei Nishikori of Japan, due to injuries, at their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Frank Dancevic of Canada, center facing, reacts before pulling out of a match against Kei Nishikori of Japan, due to injuries, during their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Kei Nishikori of Japan returns the ball against Frank Dancevic of Canada during their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Kei Nishikori of Japan reacts after getting a point against Frank Dancevic of Canada during their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Frank Dancevic of Canada returns the ball against Kei Nishikori of Japan during their 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)

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Kei Nishikori, center, of Japan signs autographs for fans after Japan's win over Canada at the 1st round of Davis Cup World Group tennis in Tokyo, Sunday, Feb. 2, 2014. (AP Photo/Shizuo Kambayashi)