Zheng rallies past Keys, Potapova upsets Anisimova at US Open

NEW YORK -- Olympic gold medalist Zheng Qinwen extended her return to the US Open with a spectacular and stunning rally, winning the final seven games to eliminate No. 22 Madison Keys 1-6, 7-6 (3), 7-5 on Saturday.

Amanda Anisimova, like Keys a past runner-up at the US Open, also was knocked out when the No. 10 seed lost to No. 24 Anastasia Potapova 6-2, 7-5.

Keys won a three-set match in the previous round in a match tiebreaker when she fought off five match points. Two days later came a collapse that was as out-of-nowhere as that comeback.