Six-time major champion Iga Swiatek and world No.5 Elena Rybakina have punched their tickets into the Australian Open's last-16, rounding out a dominant first week for the big hitters.
Seventeen of the 20 highest men's and women's seeds are still alive at Melbourne Park heading into the second week.
Felix Auger-Aliassime and Jasmine Paolini, the seventh seeds, and 10th-seeded Swiss Belinda Bencic are the only top-10 contenders to fail to reach the fourth round.
Under Margaret Court Arena's closed roof to shield players from the Saturday evening heat, Polish superstar Swiatek scored a topsy-turvy 6-1 1-6 6-1 win over 31st seed Anna Kalinskaya.
Vying to become the third youngest player in the open era to complete a career grand slam, Swiatek was excited to return to the fourth round in Melbourne after twice falling at the semi-final hurdle.
The Pole set up a David v Goliath encounter with Maddison Inglis after two-time AO champion Naomi Osaka handed the Australian qualifier a walkover following an abdominal injury.
Inglis, who survived match points in the opening round of qualifying, is one of three unseeded players left in the women's main draw and carrying the hopes of the nation with Alex de Minaur.
"I'll do everything I can to take it up to Iga on Monday," the 28-year-old Perth native said.
Rybakina, meanwhile, continued to warm into her Open campaign with a 6-2 6-3 win over Czech teen Tereza Valentova on John Cain Arena.
The Russian-born Kazak, who will face Belgian 21st seed Elise Mertens in the fourth round, has won 16 of her last 17 matches but reckons she's yet to hit her stride.
"I feel that, for now, it's not my best tennis yet," said Rybakina, 2023 runner-up to this year's hot favourite Aryna Sabalenka.
"I'm slowly trying to work on some things."
No unseeded players are left in the men's draw after former US Open champion Marin Cilic and American Ethan Quinn were sent packing by Casper Ruud and Jakub Mensik respectively.
Ruud's 6-4 6-4 3-6 7-5 victory over Cilic came after bushfire smoke momentarily suspended play so the roof of Margaret Court Arena could be closed again.
Expecting the birth of his first child, the 12th-seeded Norwegian Ruud is sticking to his plan to return home at a moment's notice should he get a call from his wife Maria.
"I can't really control ... hopefully she stays in there," he said of his soon-to-be daughter.
Earlier, Luciano Darderi, Jannik Sinner and Lorenzo Musetti made history with fourth-round berths, marking the first time three Italian men have reached the last-16 at the same Melbourne slam.
Italy is assured a quarter-finalist, with Sinner to face 22nd seed Darderi after the world No.1 battled cramp in the blistering heat to down American Eliot Spizzirri 4-6 6-3 6-4 6-4.
