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.
American great Serena Williams will face Australian 20-year-old Maya Joint in the first round of her eagerly awaited return to Wimbledon, a potentially tricky tie for the seven-time champion playing at the tournament for the first time since 2022.
Australia booked their spot in the knockout rounds of the World Cup on Thursday after a cagey draw against Paraguay, who are set to qualify as a third-placed finisher, while Turkey beat USA 3-2, scoring the winner with virtually the last kick of the match.
The Netherlands scored two goals in the first seven minutes of the first half en route to a 3-1 victory over Tunisia on Thursday night in Kansas City in Group F, while Japan and Sweden drew 1-1 in Texas.
Ecuador coach Sebastian Beccacece said all Ecuadoreans have a lot to celebrate on Thursday after the country's biggest World Cup result ever, coming from behind to beat Germany 2-1 and advance to the knockout stage.
New Zealand took control of the third Test at Trent Bridge with Tom Latham and Devon Conway setting a record partnership for the Kiwis against England on Thursday.