NEW YORK - Japan's soon-to-retire former world No. 4 Kei Nishikori advanced to the second round of qualifying for the U.S. Open on Tuesday by beating Sebastian Ofner of Austria 6-1, 2-6, 6-2.

The 2014 U.S. Open runner-up and first Japanese player to reach a Grand Slam final is aiming to appear in the main draw of a major for the last time, having announced in late April that he will retire at the end of the season.

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