World number one Aryna Sabalenka and Jessica Pegula were both upset in fourth-round matches on Saturday at the Toronto Masters.
Second seed Elena Rybakina, third seed Jessica Pegula and fourth-seeded Coco Gauff advanced to the third round of the WTA 1000 tournament in Toronto on Wednesday.
Alexandra Eala delivered an impressive victory over the four-time Grand Slam winner from Japan to reach her second WTA final, having lost her first last year at Eastbourne.
There's no panic in Coco Gauff. Down a set after untimely double-faults, Gauff rallied past Jessica Pegula 4-6, 6-3, 6-3 on Tuesday to reach the Wimbledon semifinals for the first time.
Fourth seed Jessica Pegula recovered from a set down to defeat fellow American Iva Jovic 4-6, 6-3, 6-1 on Sunday.
Top seed Jessica Pegula once again fought back from a set down to reach the WTA Charleston Open semi-finals with a 3-6, 6-3, 6-2 win against Russia's Diana Shnaider on Friday.
Amanda Anisimova said she will "lose her mind" for a couple of days after suffering defeat in her Australian Open quarter-final on Wednesday to fellow American Jessica Pegula.
Amanda Anisimova swept past China's unseeded Wang Xinyu into the Australian Open quarter-finals on Monday and a showdown with fellow American Jessica Pegula.
A clinical Jessica Pegula dumped defending champion and good friend Madison Keys out of the Australian Open on Monday to surge into the quarter-finals.
Coco Gauff said her "stubborn" decision to defy her coach and play in China after a tough US Open had paid off.