American sf

Arthur Ashe Stadium: Frances Tiafoe secured his place in the semifinals of the US Open after a quarterfinal win against Grigor Dimitrov, who was forced to retire due to injury, with Tiafoe leading 6-3, 6-7(5), 6-3, 4-1, here at Arthur Ashe Stadium.

The Bulgarian, who had been battling for supremacy throughout the match, began to struggle noticeably in the latter stages of the third set. During the eighth game, Dimitrov's movement became increasingly laboured, and he eventually called for the physio.

Despite his best efforts to continue, Dimitrov retired after three hours and four minutes of intense play.