Caroline Garcia became the latest top-10 seed to fall at the Australian Open, with a shock defeat to Magda Linette, but Aryna Sabalenka blasted her way into the quarter-finals on Monday.
This is the first Grand Slam since the Open era began in 1968 to lose the top two seeds in both the men's and women's draws before the last eight.
There have been a series of surprise results at Melbourne Park and unseeded Pole Linette got in on the action with a 7-6 (7/3), 6-4 victory over France's fourth-seeded Garcia.
Belarusian Sabalenka never really looked like she would follow Swiatek, Garcia and the rest out of the first major of the year.
Along with third-seeded American Jessica Pegula, fifth seed Sabalenka looks the woman to beat. Both are chasing a maiden major crown.
Sabalenka defeated dangerous 12th-seed Belinda Bencic 7-5, 6-2 to set up a last-eight clash against unseeded Donna Vekic, who beat 17-year-old Linda Fruhvirtova in three sets.
Hard-hitting Sabalenka sprinted into her first quarter-final at the Australian Open and said: "My whole life, it took me a little while to understand that negative emotion is not gonna help you on court.
"You have to just stay strong and believe no matter what, and then do everything you can."
Belarus' Aryna Sabalenka hits a return during a women's singles match (AFP)
