U.S. Open semifinalist Frances Tiafoe has aimed a torrent of expletives at the chair umpire after losing a match at the Shanghai Masters.

American tennis star Frances Tiafoe let loose at the chair umpire on Tuesday after a controversial call during his loss at the ATP Shanghai Masters.

Frances Tiafoe launched into a foul-mouthed tirade directed at a chair umpire after the American received a time violation and then lost to Roman Safiullin in the third round of the Shanghai Masters on Tuesday.

Novak Djokovic of Serbia waves to spectators after defeating Flavio Cobolli of Italy in the men’s singles third round match of the Shanghai Masters tennis tournament at Qizhong Forest Sports City Tennis Center in Shanghai, China, Tuesday, Oct. 8, 2024. (AP Photo/Andy Wong)

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Serbia's Novak Djokovic attends a warm up session on centre court at the All England Lawn Tennis Club, in west London on June 27, 2024, the week before the Wimbledon Championships tennis tournament is due to start on July 1.