Former world No. 1 tennis player John McEnroe of the U.S. returns a shot against Japan's Kei Nishikori during their charity tennis match in Tokyo, Sunday, Nov. 17, 2013. McEnroe, 54, gave Nishikori, 23, a run for his money in the charity match for the victims of the March 11, 2011 earthquake and tsunami. (AP Photo/Shizuo Kambayashi)

John McEnroe

Former world No. 1 tennis player John McEnroe of the U.S. returns a shot against Japan's Kei Nishikori during their charity tennis match in Tokyo, Sunday, Nov. 17, 2013. McEnroe, 54, gave Nishikori, 23, a run for his money in the charity match for the victims of the March 11, 2011 earthquake and tsunami. (AP Photo/Shizuo Kambayashi)

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