Nick Kyrgios penalised for foul-mouthed rant despite umpire admitting he made mistake

Nick Kyrgios was docked one point following his most recent rant on court.

There are calls for the Australian to be suspended from the ATP Tour following an explosive end to his semi-final defeat against Reilly Opelka.

Kyrgios - who recently got fined $60,000 for his behaviour at the Indian Wells and Miami Open - could face another fine after being docked a point for losing his cool.

The Aussie had a reason to be upset after the umpire admitted he made a mistake in a crucial moment of the second set at 5-5.

It saw the score go to 30-30 and Kyrgios lost the next point after making an unforced error. The mistake saw him swear repeatedly in a rant and the umpire had no other choice but to dock him a point.

Kyrgios went on to lose 6-3, 7-5 but the 26-year-old was lucky that he didn't get disqualified during the changeover.

As he walked over to his seat, Kyrgios continued to rip into the official and said: "F**k! How are you not calling it? It's an absolute joke."

A clearly embarrassed Joshua Bruce replied: "I believe it now, I made a mistake."

Kyrgios took to social media after the loss and demanded an improvement in the standards of umpiring.

He said that if a mistake is made, they should be held accountable.

"Haha again… falls all on me," Kyrgios said.

"Umpires seem to make these mistakes a little too often. A lot of players seemed dissatisfied with the performance of them this week in Houston.

"More punishment? Potentially new umpires? Semi final, 'I missed it Nick' on clay, 5-5 in the second set."

Opelka will play fellow American John Isner in the final of the US Men's Clay Court Championship in Houston.

In the other semi-final, Isner came from behind to overcome defending champion Cristian Garin in three sets.

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