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,

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.

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.