Novak Djokovic has come under fire from fans after a fiery exchange with the chair umpire in the final of the Australian Open.
The seven-time champion at Melbourne Park already had a pro-Dominic Thiem loudly cheering against him inside Rod Laver Arena on Sunday night.
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However, the Serb’s night got a whole lot worse courtesy of a controversial moment during a tense second set.
The 16-time grand slam champion looked at times unstoppable on his way to claiming the opening set against the Austrian fifth seed.
The first cracks began to appear in the second set though, with Djokovic on serve and the scores locked at 4-4.
Thiem gave himself a sniff at a vital break when Djokovic was twice pinged by the chair umpire for time violations on his serve.
Djokovic was 15-40 down on the second occasion, meaning he was denied a first serve on break point after failing to beat the serving clock.
Thiem made the most of the contentious call to take his break chance, much to the frustration of his opponent.
Djokovic, clearly irked by the call, then risked further penalty after sarcastically tapping the chair umpire's foot, before the change of serves.
The Serb could be heard showering the official with false congratulations for "making yourself famous".
While it appeared a cruel turn of events for Djokovic at such a crucial stage in the match, he found little sympathy from viewers.
Austrian capitalises on drama to surge ahead
Thiem made the most of the controversial moment to consolidate the break point and level the contest after serving out to claim the second set.
The drama appeared to be a lingering distraction for Djokovic in the third set as Thiem broke the 32-year-old in the opening game.
The Austrian had the momentum well and truly on his side and the wheels threatened to fall off for his Serbian opponent, when Thiem grabbed a double break to go 3-0 up.
Commentators Todd Woodbridge and Jim Courier expressed their concern for Djokovic, who lost six straight games since the controversial time penalty, before finally holding serve.
At 4-1 down in the third set, Djokovic received treatment from a doctor as his issues began piling up.
The World No.2 soon found himself in the unfamiliar position of being two sets to one down as well after Thiem clinched the third stanza, 6-2.