French wild card Lois Boisson produced a stunning upset at the Roland Garros on Monday, ousting American world No. 3 Jessica Pegula in a thrilling 3-6, 6-4, 6-4 victory.

Loïs Boisson had never even played at the French Open before, let alone in the biggest arena at Roland-Garros, and now the unseeded 21-year-old Frenchwoman is through to the quarterfinals.

American Jessica Pegula, the world No. 3-ranked woman, lost to world No. 361 Lois Boisson in a shock French Open upset Monday. Boisson electrified the local crowd as she advanced to the quarterfinals, the only man or woman to reach the round this year.