Cameron Norrie claimed the best grand slam win of his career at the Australian Open against Casper Ruud to make the second week for the first time.
But world number one Iga Swiatek is out after being stunned in three sets by Czech teenager Linda Noskova, opening the women’s draw right up.
Carlos Alcaraz benefited from the retirement of Shang Juncheng after little over an hour, while Daniil Medvedev and Alexander Zverev also won.
Picture of the day
Stat of the day
Fallen seeds
Women: Iga Swiatek (1), Jelena Ostapenko (11), Emma Navarro (27)
Men: Casper Ruud (11), Tommy Paul (14), Ugo Humbert (21), Felix Auger-Aliassime (27), Tallon Griekspoor (28)
Who’s up next?
Novak Djokovic plays in the day session for the first time this fortnight against France’s Adrian Mannarino while home hope Alex De Minaur meets fifth seed Andrey Rublev at night.
Coco Gauff plays Pole Magdalena Frech, and 16-year-old Mirra Andreeva will look to reach her first grand slam quarter-final against Barbora Krejcikova.