Michelsen stuns Tsitsipas; Tiafoe through in 5 sets Alex Michelsen, a 20-year-old unseeded American, produced the biggest win of his young career with a 7-5, 6-3, 2-6, 6-4 first-round upset of No. 11 Stefanos Tsitsipas on Monday.

Svitolina stuns No. 1 Swiatek; Pegula tumbles Elina Svitolina ousted No. 1 Iga Swiatek to reach the Wimbledon semifinals, while American Jessica Pegula lost after holding a 4-1 lead in the final set.