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.

Tiafie launched into an f-bomb laden rant against umpire Jimmy Pinoargote after losing to Safiullin in Shanghai.

The US Open semi-finalist was given a time violation at 5-5 in the deciding tiebreak as he lost to Roman Safiullin

The Shanghai Masters is turning into a hotbed of controversy as ATP stars clash not only with each other but with officials. With back-to-back days of scheduling chaos already frustrating players, the drama escalated when American tennis star Frances Tiafoe’s outburst against a chair umpire took center stage.