Defending champion Iga Swiatek set up a rematch of last year's French Open final against Coco Gauff by moving into the Roland Garros last eight.
Swiatek, going for a third title on the clay, progressed when Ukraine's Lesia Tsurenko retired ill with the Polish player leading 5-1 in the first set.
Sixth seed Gauff, 19, beat Slovakia's Anna Karolina Schmiedlova 7-5 6-2.
Tunisia's Ons Jabeur moved into the quarter-finals for the first time with a 6-3 6-1 win over Bernarda Pera.
Jabeur played in the Wimbledon and US Open finals in 2022 but lost in the first round at Roland Garros last year.