Ukraine's Lesia Tsurenko recovered from the brink of collapse due to heat exhaustion to reach her first Grand Slam quarter-final on Monday, defeating Czech teenager Marketa Vondrousova 6-7 (3/7), 7-5, 6-2.
World number 36 Tsurenko was a set and 0-2 down when she bent double on the Grandstand court, looking increasingly unsteady on her feet in the 33-degree heat and crushing humidity.
"I was really dizzy and I asked nature or God or somebody please move the shade over faster," said the 29-year-old.
"I just thought, OK, I need just five minutes. Keep fighting and I will feel better and that's what happened."
"Now I need to rest and take an ice bath. I hate them but now I need it today."
In the two-hour 32-minute match, which featured 13 breaks of serve, Tsurenko committed 57 unforced errors while 19-year-old Vondrousova hit a huge 73.
Tsurenko, who knocked out world number two and Australian Open champion Caroline Wozniacki in the second round, will face Japan's Naomi Osaka for a place in the semi-finals.