Frank Dancevic

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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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Frank Dancevic of Canada sits with an ice pack on his head after collapsing during his first round match against Benoit Paire of France as temperatures topped at 43 C (108 F) at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 14, 2014. (AP Photo/Aijaz Rahi)