Wang Yafan produced an impressive display to beat Tianjin Open defending champion Caroline Garcia in straight sets.
Tianjin Open seeds Wang Qiang and Dayana Yastremska moved into round two, with Saisai Zheng beating regular doubles partner Ying-Ying Duan.
Wang Qiang succumbed to a first-round loss against Shuai Peng, but Elina Svitolina coasted through at the Guangzhou Open.
Serena Williams celebrated her 100th US Open win on Tuesday and then conceded she is unable to recall her first.
US Open favourite Serena Williams dished out a hammering in the quarter-finals, crushing China's Wang Qiang for the loss of just one game.
An ankle scare marked Serena Williams' fourth-round win at the US Open, where Ashleigh Barty and Karolina Pliskova were beaten.
There will be no US Open quarter-final clash between Ashleigh Barty and Serena Williams after the Australian lost to Wang Qiang.
Camila Giorgi saved four match points to edge Wang Qiang in the Bronx Open semi-finals.
Wang Qiang recovered from a first-set bagel to prevail 0-6 6-1 6-4 against Russian lucky loser Anna Blinkova on Thursday.
Wang Qiang got her preparations for the US Open off to a comfortable start, easing into the Bronx Open quarters by seeing off Fiona Ferro.