World number 361 Lois Boisson pulled off the biggest shock of this year's French Open with a stunning fourth-round victory against third seed Jessica Pegula.
The French player, given a wildcard into the main draw after tearing an anterior cruciate ligament in her knee last year, came through 3-6 6-4 6-4 against the US Open runner-up.
Boisson is making her debut in the main draw of a Grand Slam and had never played an opponent ranked in the world's top 50 before this week.
The 22-year-old had to stave off four break points as she served for the match at 5-4 in the third set before sealing victory with a thumping forehand winner.