Qinwen Zheng staged a second epic comeback at the US Open in as many days to stun former champion Iga Swiatek and book her place in the quarter-finals for the third time. Two days on from saving match point while trailing 5-0 in the third set to Madison Keys, Zheng mounted another remarkable fightback on Arthur Ashe. Swiatek won the first five games but Zheng simply refused to roll over, winning the next seven games to clinch the first set before overpowering her shellshocked opponent to complete an astonishing 7-5 6-3 victory.

A stunned Swiatek never recovered, and the 2022 champion succumbed in straight sets, 7-5 6-3, leaving the court in tears after her campaign unravelled in unthinkable fashion. The former world No 4 from China, who had come through qualifying after being sidelined by a long-term elbow injury, became the first qualifier to reach the quarter-finals since Emma Raducanu won the tournament in 2021. Zheng's reward is a last-eight tie against either Naomi Osaka or Elena Rybakina.