Shelton, the 21st seed and a U.S. Open semifinalist in 2023, defeated No. 16 Lorenzo Musetti of Italy 6-3, 3-6, 6-4, 7-6 (5) and will take on Monfils on Monday.
Michelsen will try to send another high seed packing when he plays No. 8 Alex de Minaur, an Australian who beat No. 31 Francisco Cerúndolo 5-7, 7-6 (3), 6-3, 6-3. Tien faces 55th-ranked Lorenzo Sonego of Italy, a 6-7 (3), 7-6 (6), 6-1, 6-2 winner over Fabian Marozsan.
Against Raducanu, who won the 2021 U.S. Open as a teenage qualifier, Swiatek played at a level she called “perfect.”
Indeed, Swiatek mounted a 24-9 edge in winners, made only 12 unforced errors — roughly half of Raducanu’s 22 — and claimed 59 points to 29. That caused one spectator to yell out, “No mercy!” in the second set as Swiatek was reeling off the last 11 games after the match was tied at 1-all early with not a cloud in the sky and the temperature approaching 80 degrees Fahrenheit (above 25 Celsius).
“I think it was a little bit of her playing well, and me not playing so well,” Raducanu said. “That combination is probably not good.”
Fair.
Swiatek, who agreed to accept a one-month suspension in a doping case late last year, owns four trophies from the French Open and one from the U.S. Open. But she’s never been beyond the semifinals in Australia; she lost in that round to Danielle Collins in 2022.
A year ago, Swiatek was upset in the third round by teenager Linda Noskova.
Swiatek, who said she dedicated Saturday’s win to her grandfather, has ceded a total of only 10 games through three matches with new coach Wim Fissette sitting courtside. Next up will be 128th-ranked Eva Lys of Germany, who lost in qualifying but was given a spot in the main draw when someone withdrew about 10 minutes before her first-round match.
Lys defeated Jaqueline Cristian 4-6, 6-3, 6-3 and is the first “lucky loser” to get to the Australian Open’s fourth round since the tournament moved to Melbourne Park in 1988.
Others who now will get a chance to play for a quarterfinal berth after victories Saturday included No. 6 Elena Rybakina, No. 8 Emma Navarro and No. 9 Daria Kasatkina. Rybakina, the 2022 Wimbledon champion, beat No. 32 Dayana Yastremska 6-3, 6-4, Navarro eliminated three-time major finalist Ons Jabeur 6-4, 3-6, 6-4, and Kasatkina got past No. 24 Yulia Putintseva 7-5, 6-1. Unseeded Veronika Kudermetova beat No. 15 Beatriz Haddad Maia 6-4, 6-2.
No. 4 Jasmine Paolini, who is a two-time Slam finalist, was eliminated by No. 28 Elina Svitolina 2-6, 6-4, 6-0.
Navarro, who reached her first major semifinal at Flushing Meadows in September, has won all three of her matches in Melbourne this year in three sets. That means she has been involved in 30 tour-level three-setters since the start of last season, the most of any female player.
“I love three sets. I love tennis so much, I can’t resist,” joked Navarro, who grew up in South Carolina and won an NCAA singles title at the University of Virginia. “I just wanted to stick in there and keep believing in myself.”