Zheng Qinwen makes big US Open comeback. Naomi Osaka joins her in the fourth round

Olympic gold medalist Zheng Qinwen advanced to the fourth round of the US Open after a remarkable comeback, winning the final seven games to defeat No. 22 seed Madison Keys 1-6, 7-6 (3), 7-5. Naomi Osaka also progressed to the fourth round in the same day's action. Zheng's victory marked a stunning turnaround after losing the opening set 1-6.