US Open fans made their feelings known during the semi-final match between Alexander Zverev and Karen Khachanov, when Zverev was issued a time violation by the chair umpire, Damien Dumusois. The warning came at a crucial moment in the second-set tiebreak, just as Zverev was about to serve with a set point on his racket.

Throughout the match, Zverev had been bouncing the ball excessively, particularly between his first and second serves, which is when the shot clock does not run. As he prepared to serve while leading 7-6, the umpire called the time violation, marking the first of the match for the German player. The crowd at Arthur Ashe Stadium erupted into cheers, indicating their approval of the decision.

Commentators noted the timing of the violation, with Sky Sports commentator Jonathan Overend remarking on how umpires often wait until the end of a set to enforce such rules. "Finally, Zverev called against the shot clock," he stated, suggesting that umpires should either enforce the rule earlier or eliminate the shot clock altogether.

Despite the violation, Zverev managed to land his serve but ultimately lost the set, as Khachanov leveled the score with a remarkable backhand passing winner. The match had already been a rollercoaster, with Zverev initially taking an early break lead before Khachanov made a strong comeback, breaking Zverev's streak of five consecutive games.

As the match progressed, Zverev faced challenges, including three double faults during the second set. However, he regained his composure and managed to secure a 6-3, 7-6(6) lead after a tense series of rallies. The match showcased not only the intense competition between the two players but also the passionate involvement of the fans, who clearly had their opinions on the officiating and the match dynamics.