Kamil Majchrzak defeated Ethan Quinn 6–1, 6–4, 6–3 in the first round of Wimbledon on grass on 2 July 2025, upsetting the pre-match favourite Quinn, who carried odds of 1.72 to Majchrzak's 2.26. Majchrzak's commanding performance across all three sets demonstrated superior control on the grass surface, breaking Quinn's serve repeatedly and limiting opportunities for the favoured player to establish rhythm. The Polish competitor's dominant display marked a significant upset, securing a straightforward passage into the second round and suggesting strong form heading deeper into the tournament.