Rising Russian Daria Kasatkina has sent Australian Open champion Caroline Wozniacki crashing out of the French Open in Paris.
The pair had returned to Roland Garros on Monday to resume a match suspended by darkness on Sunday night.
But Wozniacki was quickly back in the locker room packing her bags after Kasatkina won three straight games from 3-3 in the second set to complete a watershed 7-6 (7-5) 6-3 fourth-round victory.
Seeded 14th, the 21-year-old is through to her maiden grand slam quarter-final and next plays reigning US Open champion Sloane Stephens after snapping Wozniacki's 10-match winning streak at the majors.
"It's definitely not easy, but it's the same for both, obviously. You just try and recoup and regroup and come back and get a strong start," said Wozniacki, offering no excuses for the stop-start defeat.
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"I honestly didn't think I played badly this morning. She didn't miss one ball, and she was playing very close to the lines. I was trying what I could, but it just wasn't enough today."
While the Danish second seed is out, world No.1 Simona Halep earlier underlined her title credentials with a clinical dispatch of tournament dark horse Elise Mertens.
The top-seeded two-time Roland Garros runner-up swept into the quarter-finals with a 6-2 6-1 fourth-round win over the Belgian.
Runner-up to Jelena Ostapenko last year and to Maria Sharapova in 2014, Halep needed less than an hour to see off a rival boasting three trophies in 2018 plus a 12-win streak this season on clay.
Halep will play either Angelique Kerber in a rematch of her epic Australian Open semi-final win over the German or France's last hope, seventh seed Caroline Garcia, for a spot in the last four.
Halep joins Kasatkina, Stephens, fellow American Madison Keys and unseeded Kazakh Yulia Putintseva in the quarter-finals.
Unlike her third-round escape against Camila Giorgi, Stephens never gave Anett Kontaveit a sniff, winning the last 11 games to reach the quarter-finals for the first time with a 6-2 6-0 demolition of the Estonian.
Stephens had fallen at the fourth hurdle five times previously but needed just 52 minutes to break through and complete a grand slam set of quarter-final showings in Melbourne, Paris, London and New York.
Runner-up to Stephens at Flushing Meadows last year, Keys was the first woman through to the quarters after ending Mihaela Buzarnescu's inspired run with a 6-1 6-4 victory over the Romanian.
The 13th-seeded Keys, who is yet to drop a set, plays Putintseva next after the Kazakh youngster upset Czech 26th seed Barbora Strycova 6-4 6-3 to advance to the final eight for the second time in three years.
Three-times champion Serena Williams can make it three Americans in the last eight if she beats Maria Sharapova in their spicy fourth-round affair later on Monday.
