Olympic champion Zheng Qinwen fought again from a set right down to beat world quantity 50 Amanda Anisimova 4-6 6-4 6-2 on Louis Armstrong Stadium.
Anisimova raced out to a 5-1 first-set lead however twice did not serve out the primary set, earlier than breaking Zheng for the third time to shut it out.
However Zheng, a bit over three weeks on from her Olympic triumph in Paris, recovered nicely and served beautifully from then on to safe victory.
The Chinese language seventh seed stated it was the “typical match” she would have misplaced previously, including that victory was “one step ahead in my psychological facet”.
“Often after enormous success I’ll get a bit bit too excessive, and till the truth slap me down once more and I come again to the bottom,” Zheng stated.
“So this time once I get successful, I am telling myself, I do not wish to let this occur. I am actually blissful to get this match, as a result of she’s actually robust to face.”
Daria Kasatkina, the twelfth seed, beat Romania’s Jaqueline Cristian 6-2 6-4 to progress, whereas Ukrainian twenty seventh seed Elina Svitolina got here by means of in three units towards Maria Lourdes Carle of Argentina.
Nevertheless, Maria Sakkari turned the primary top-10 participant to fall, with the ninth seed pressured to retire injured after dropping the primary set to Wang Yafan.
A visibly upset Sakkari obtained remedy from the coach to her shoulder and neck halfway by means of the primary set, and was in the end unable to proceed right into a second.
American 14th seed Madison Keys, runner-up at Flushing Meadows in 2017, moved previous Katerina Siniakova of the Czech Republic 6-4 6-1.