Heather Watson moved into the Mexican Open quarter-finals, while teenager Leylah Fernandez continued her run on Wednesday.
Watson, the British seventh seed at the WTA International event, was too good for Kateryna Bondarenko 7-6 (7-2) 6-2.
Zhu Lin was the other seed to advance, getting past Katie Boulter 7-6 (7-2) 7-5 in one hour, 48 minutes.
Another seed fell in Nao Hibino, who was crushed by Canadian 17-year-old Fernandez 6-3 6-0 in just over an hour.
Canadian Crush
— WTA (@WTA) February 27, 2020
17-year-old Leylah Annie Fernandez scores a maiden WTA quarterfinal and first back-to-back main draw wins of her career in a dominant 6-3 6-0 victory over Hibino.#AMT2020 pic.twitter.com/AEOB1o6pCT
Renata Zarazua, Tamara Zidansek, Anastasia Potapova, Christina McHale and Wang Xiyu also moved into the last eight.