Stefanos Tsitsipas maintained his perfect record in Grand Slam quarterfinals, beating No 11-seeded Jannik Sinner 6-3 6-4 6-2 on Wednesday to reach the last four of the Australian Open. The 23-year-old, No 4-ranked Tsitsipas improved to 5-0 at this stage of a major. It's the semifinals he's yet to master, winning just one at Roland Garros last year from four so far. He'll next player either Daniil Medvedev, who made his Grand Slam breakthrough when he won last year's US Open title, or No 9 Felix Auger-Aliassime No. 2 Medvedev and Auger-Aliassime were meeting later on Wednesday in a night match.

Tsitsipas didn't face a break point and converted all four he got on Sinner's serve in the match that lasted just over two hours, considerably less than his five-set fourth-round win over Taylor Fritz. The only real delay came from a weather disruption, when a late afternoon storm meant the roof over Rod Laver Arena had to be closed when the Greek star was already up a set and a break. "I knew I was heading toward the right direction," Tsitsipas said. "The conditions might have changed a little bit after the roof was closed slightly faster, not as bouncy as before. I tried to adapt to the new conditions, and it just worked." Dozens of ball kids and staff used towels to soak up water on the court in the 15-minute break. The temperature dropped from the highs of the afternoon, when Iga Swiatek took three hours in the afternoon heat to beat 36-year-old Kaia Kanepi 4-6 7-6(2) 6-3, with the payoff being a spot in the semifinals against Danielle Collins.