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.
Michelsen, 20, stuns Tsitsipas; ill Tiafoe wins in 5
Jan 12, 2025 | 9:51 PM
