Russian 14th seed Daria Kasatkina stunned world number two and Australian Open champion Caroline Wozniacki 7-6 (7/5), 6-3 to reach her first Grand Slam quarter-final at Roland Garros on Monday.
Kasatkina raced away with the last three games of the tie which had been halted at 3-3 in the second set late Sunday because of bad light.
Kasatkina will face US Open winner Sloane Stephens for a place in the semifinals.
Halep races into third French Open quarterfinal
World number one Simona Halep, the runner-up in 2014 and 2017, routed Belgian 16th seed Elise Mertens 6-2, 6-1 to reach the French Open quarterfinals for the third time.
Top seed Halep will take on either German 12th seed Angelique Kerber or Caroline Garcia, the seventh-seeded Frenchwoman who made the last-eight in 2017.
Halep won in 59 minutes with the second set taking just 22 minutes.
The Romanian broke serve six times against a player who made the semi-finals at the Australian Open in January.