NEW YORK - Japan's Kei Nishikori was beaten by compatriot Rei Sakamoto 6-4, 7-6(3) in the U.S. Open qualifying third round Friday, falling a win short of making his last Grand Slam main draw before his retirement at the end of the season.

The 36-year-old Nishikori, the first Asian man to reach a Grand Slam final at the tournament in 2014, was unable to overcome the big-serving 20-year-old Sakamoto, who sealed the win with his 19th ace against none from the veteran at Flushing Meadows.

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