Unseeded Russian Anastasia Pavlyuchenkova ground down American fifth seed Sloane Stephens to reach the Australian Open quarter-finals in a late-night epic that ended in the early hours of Monday.
The world number 44 beat Stephens 6-7 (3/7), 6-3, 6-3 to set up a last eight clash with another American, Danielle Collins who knocked second seed Angelique Kerber.
"I really appreciated that some of you guys stayed," said the Russian, who also make the quarter-finals in 2017.
"I heard someone was yawning during the match though, so I'm sorry. I thought it was quite an exciting match, but anyway I'm happy I stayed awake."