'You're All Weirdos!': Tsitsipas Blows Up At US Open Umpire

Stefanos Tsitsipas accused a US Open chair umpire of being biased against him during an on-court tirade.

"You're all weirdos!" the eighth seed from Greece told Damien Dumusois.

The argument came midway through the fourth set of Tsitsipas' 6-4 6-7 (7-5) 7-6 (9-7) 7-5 loss to Andrey Rublev on Tuesday in the first round, when Tsitsipas appeared to be battling cramps and was slow to return to the court after losing his serve.

Crampsipas. Image: SIPA USA

Dumusois told Tsitsipas it was time to play, but Tsitsipas was still reaching into his bag for a new headband and screamed at Dumusois that he still needed time to change.

Dumusois responded that Tsitsipas would be penalised.

"I don't care," Tsitsipas replied. "Do whatever you want, because you're the worst.

"I don't know what you have against me, because you're French probably and you're all weirdos! You're all weirdos!"

Dumusois is indeed French.

Forehandsipas. Image: SIPA USA

Tsitsipas had been angry that Dumusois believed he was getting coaching during the match from his father, Apostolos, which is not allowed.

"The chair umpire was very incorrect in what he was telling me during the match," Tsitsipas said afterward.

"I don't know what this chair umpire has in specific against my team, but he's been complaining and telling me that my team talks all of the time when I'm out on the court playing. He's very - I don't know.

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"I believe he's not right, because I never hear anything of what my team says from the outside."

Tsitsipas added he thought tennis needed more umpires who are fair to all players.

"I feel like some of them have preferences when they are on the court," he said.

Tsitsipas lost in the first round for the second straight major tournament after opening his season by beating Roger Federer en route to the Australian Open quarter-finals.

He said the influence from Dumusois was one of his problems on Tuesday.

"Well, it's not very pleasant when you have the umpire give you warnings and time violations and coaching violations during a match," Tsitsipas said.

"It can affect your thinking. It can affect your decision-making."