Swiatek was beaten by Wimbledon champion Elena Rybakina while Gauff lost to Jelena Ostapenko. Third seed Jessica Pegula, now the highest seed left, continued to look strong in a 7-5 6-2 win over Barbora Krejcikova.
Stefanos Tsitsipas survived a five-set battle with Jannik Sinner, while Jiri Lehecka upset Felix Auger-Aliassime and Sebastian Korda saw off Hubert Hurkacz.
Picture of the day
Instagram post of the day
Stat of the day
British interest in singles may have ended but several players are still going strong in doubles. Neal Skupski, with Dutch partner Wesley Koolhof, and Joe Salisbury and American Rajeev Ram are through to the third round in men’s doubles while Jamie Murray and American Taylor Townsend are into the mixed quarter-finals.
Wheelchair tennis great Shingo Kunieda, winner of 50 grand-slam titles, including a record 28 in singles, is calling it a day.
Women: Iga Swiatek (1), Coco Gauff (7), Barbora Krejcikova (20).
Men: Felix Auger-Aliassime (6), Hubert Hurkacz (10), Yoshihito Nishioka (31).
Who’s up next?
The next test of Novak Djokovic’s troublesome left hamstring will come when he takes on home favourite Alex de Minaur in the night session on Rod Laver Arena on Monday.
A place in the quarter-finals will be on the line, as it will be for fifth seed Andrey Rublev and ninth seed Holger Rune when they do battle.
The pick of the women’s matches pits two in-form players against each other in Aryna Sabalenka and Belinda Bencic.