Swiatek, who won the WTA 1000 tournament in 2022, 2023 and 2024, had breezed through her last six meetings with Kasatkina without dropping a set but blew a 5-3 lead to lose the opener.
Australian Open chief Craig Tiley said it was "a fine line" between player promotion and privacy after top stars complained about backstage cameras at the Grand Slam.
Coco Gauff called herself "a real person with real feelings" as fellow players backed a call for more privacy during tournaments, with Iga Swiatek saying they felt like "animals in the zoo".
Fifth seed Elena Rybakina stunned world number two Iga Swiatek to race into the Australian Open semi-finals Wednesday.
Six-time major champion Iga Swiatek ended the fairytale run of qualifier Maddison Inglis with a rampant display at the Australian Open on Monday to set up a quarter-final with fifth seed Elena Rybakina.
World No. 2 Iga Swiatek registered a 6-2, 6-3 straight-set victory at the Australian Open on Thursday, reaching the third round in her 24th consecutive Grand Slam.
Iga Swiatek survived a fright Monday before battling past Chinese qualifier Yuan Yue to launch her bid for a career Grand Slam in unconvincing fashion at the Australian Open.
A defiant Novak Djokovic launches his latest bid to win a record 25th Grand Slam crown while title contenders Coco Gauff and Iga Swiatek are also in action at the Australian Open on Monday.
Iga Swiatek said Friday it would be a dream to complete a career Grand Slam at the Australian Open but "grinding" through the first round was the Polish star's focus.
Carlos Alcaraz knows what matters the most to him in 2026 and isn't shy about telling the world: He wants to win the Australian Open to complete a career Grand Slam.