Donna Vekic came from behind to beat World No. 2 Aryna Sabalenka in the second round of the Dubai Duty Free Tennis Championships.
The match ended 6-7(5), 6-3, 6-0 in 2 hours and 22 minutes.
It's the Croatian's sixth win in eight encounters with Sabalenka dating back to 2016. She will next face Sorana Cirstea, who defeated 13th seed Veronika Kudermetova 6-1, 6-4.
Vekic, who has reached two Grand Slam quarterfinals in her career to date, will be bidding to reach the last eight of a WTA 1000 tournament for the first time.
Elsewhere, fourth seed Elena Rybakina advanced to the round of 16 after former world number one Victoria Azarenka was forced to retire with an injury before the third set after her Kazakh opponent levelled the match at 4-6 6-2.
In-form former French Open champion Jelena Ostapenko eased past Swiss Lulu Sun 6-3 6-3, while Wimbledon champion Marketa Vondrousova was made to work hard by American Peyton Stearns before sealing a 6-1 5-7 6-2 victory.
Arsenal's Leandro Trossard capitalised on dreadful defending to secure a 1-0 win against Manchester United that saw the Gunners climb back to the top of the Premier League, ensuring the title race will be decided on the final day.
UAE Team Emirates rider Tadej Pogacar has retained his overall lead after Dutchman Olav Kooij won stage nine of the Giro d'Italia on Sunday, pipping Jonathan Milan by half a wheel right at the finish line in a breathless sprint at the end of a 214-km ride from Avezzano to Naples.
Rory McIIroy claimed his fourth Wells Fargo Championship after a superb back nine saw him finish -17 par having trailed by two shots after seven holes.
Alejandro Tabilo claimed the biggest win of his career beating world number one Novak Djokovic 6-2 6-3 in the third round of the Italian Open, two days after the Serbian was hit on the head by a water bottle.
Norwich City and Leeds United played out a goalless draw in the first leg of their Championship play-offs semi-final tie as both teams seek a return to the Premier League.