Tennis News Today: Frances Tiafoe stirs controversy at Shanghai Masters with 'f*ck you' rant; Coco Gauff's ex-coach slams big error during Stan Wawrinka vs Flavio Cobolli encounter

Frances Tiafoe lost his composure after his third-round defeat at the Shanghai Masters. The American was seen hurling abuse at the chair umpire shortly after the end of his match. Meanwhile, Alexander Zverev went on a rant against the official after a disputed call during his match against Tallon Griekspoor.

In other news, Coco Gauff's former coach Brad Gilbert shared his opinion against an umpiring mistake at the Shanghai Masters. Also, Grigor Dimitrov lost his cool after being tripped up by a fan while making his way out of the stadium.

On that note, here's a recap of today's tennis news:

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Frances Tiafoe hurls abuse towards the chair umpire after his Shanghai Masters defeat against Roman Safiullin

Frances Tiafoe suffered a shock defeat, at the Shanghai Masters, by Roman Safiullin in the third round. The American won the first set before losing the match in the final set tie-break against his Russian counterpart. However, Tiafoe's angry reaction at the end of the match stole the limelight.

After shaking hands with Safiullin at the net, Tiafoe turned straight towards the chair umpire, Jimmy Pinoargote, before dropping two F-bombs in his direction. His frustration boiled over after the chair-umpire decided to take away his first-serve for time violation during the final set tie-break.

With the match tied at 5-5 in the third set tie-break, Tiafoe was given a time violation for taking too long on his first serve. Despite pleading his case, the chair-umpire refused to change his decision. The American went on the lose the next two points and lost the match.

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Alexander Zverev erupts at the chair-umpire during his win against Tallon Griekspoor

Alexander Zverev went on a rant against the poor officiating by umpires during his three-set win against Tallon Griekspoor. The German was unhappy with some of the decisions by the officials and went on a rant against the chair umpire, Mohamed Lahyani.

Alexander Zverev was frustrated after a decision went against him during the first set when the umpire adjudged that the German hit the ball back after it had already bounced twice. However, Zverev disagreed with the decision and started a rant towards the chair-umpire during the changeover.

"How on earth are you calling that? I got the ball completely clean?" Let me say something, you guys umpires are f***ing up the whole tournament this year. Completely. I have a Grand Slam final, I lose it because of you guys' mistake. I’m here running my a*** off with the illness, you guys still do mistakes," Zverev said.

Zverev claimed that poor officiating was ruining the tournament for him. He further added that poor umpiring decisions have already cost him during the Grand Slam finals. Zverev threw away his racquet in frustration and received a code violation.

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Brad Gilbert left fuming over the umpiring error during the Stan Wawrinka match at the Shanghai Masters

Coco Gauff's former coach, Brad Gilbert was left disappointed after a major umpiring error made the headlines during the Stan Wawrinka and Flavio Cobolli encounter at the Shanghai Masters.

With the match tied at two sets all, Cobolli got the only break of the final set early on in the decider. The Italian broke Wawrinka's serve during the second game of the third set but not without controversy. Stan Wawrinka won the first point of the game and should have led 15-0, however, the chair umpire, Carlos Bernardes, failed to update the scoreline. When Cobolli won the second point during the game, Bernardes updated the scoreline to 30-0 in favor of the Italian leading him to break Wawrinka's serve.

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None of the players realized this mistake and Cobolli held on during his service games to win the match in three sets. Gilbert was left furious at the mistake which cost Wawrinka the match. The American called the situation 'inexcusable' before claiming he was 'dumbfounded' by the whole umpiring mistake.

"How does that basic mistake happen and was not corrected? Did not see the match. If this happened, inexcusable," Gilbert posted on his Twitter account.

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Grigor Dimitrov loses his cool and confronts a fan at the Shanghai Masters

Grigor Dimitrov lost his cool after being tripped by a fan while making his way out of the stadium after his third-round win at the Shanghai Masters. The Bulgarian was surrounded by a big crowd while leaving the stadium and almost came to blows after being tripped by a fan.

After defeating Alexei Popyrin in their third-round clash at the Shanghai Masters, the veteran was seen leaving the stadium. However, the Bulgarian was swarmed by a large crowd trying to get a glimpse of him and asking for autographs.

While the ATP officials and security tried to keep the situation under control, one fan got too close to Dimitrov and nearly tripped him to the ground. Angered by this, Dimitrov moved aggressively towards the fans before being held back by the security. The veteran was seen pointing towards the fan before moving away from the scene.

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