Two of the top three seeds crashed out of the WTA Qatar Open in the round of 16 as Barbora Krejcikova and Paula Badosa both lost, though top seed Aryna Sabalenka is through to the quarter-finals, along with Coco Gauff.
Sabalenka eased past Jil Teichmann 6-2 6-1 in Doha, winning an impressive 70 per cent of her second serves as she rarely gave her Swiss opponent any hope in a match that lasted just over an hour.
The Belarusian will now play Iga Swiatek in the last eight after the seventh seed beat Daria Kasatkina 6-3 6-0.
Number two seed Krejcikova was eliminated by the winner in Dubai last week, Jelena Ostapenko, 6-3 6-2. The Czech struggled to get going and ended the match with seven double faults to her name.
World number four Badosa fared no better as she also lost in straight sets to Gauff 6-2 6-3, with the 17-year-old winning a dominant 77.1 per cent of points on her first serve.
Badosa is the joint-highest ranked player that Gauff has defeated, along with Naomi Osaka, who was also ranked fourth in the world when she lost to the teenager at the 2020 Australian Open.
Gauff will now face Maria Sakkari after the Greek defeated another American, Jessica Pegula.
Ostapenko will go up against reigning WTA Finals champion Garbine Muguruza who convincingly defeated Madison Brengle 6-0 6-2.
Number four seed and St Petersburg champion Anett Kontaveit is through after a topsy-turvy clash with Elise Mertens 6-3 0-6 6-2 and will come up against Tunisia's Ons Jabeur.