Serena Williams' loss in the third round of the U.S. Open brings an end to her tennis career.

A trainer works on the neck of Novak Djokovic, of Serbia, during his match with Ricardas Berankis, of Lithuania, during the second round at the Western & Southern Open tennis tournament Monday, Aug. 24, 2020, in New York. 1-ranked Djokovic was playing his first ATP match in six months because of the coronavirus pandemic; he pulled out of the doubles event Sunday because of his neck. That major championship's site in Flushing Meadows is hosting the Ohio-based Western & Southern Open, too, as part of an unusual doubleheader with no spectators. Like Djokovic, Serena Williams and Naomi Osaka emerged with difficult wins, while two-time Wimbledon champ Petra Kvitova, the No. Djokovic now meets American Tennys Sandgren, a 6-7 (4), 6-2, 7-6 (5) winner over No.