TOKYO - Japan's recently retired former world No. 4 Kei Nishikori enjoyed a reunion with all-time great Roger Federer in Tokyo on Sunday as the pair reflected on their rivalry and played as a doubles pair in an exhibition match.

The 36-year-old Nishikori, who won three of his 11 career meetings against the 20-time Grand Slam winner from Switzerland, recalled serving as his boyhood hero's training partner for a week when 16 in Miami.

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