'Sublime': Novak Djokovic stuns Roger Federer with 'insane' shot

Novak Djokovic went to another level in the first-set tiebreak against Roger Federer and produced a jaw-dropping shot in the process.

A topsy-turvy set saw Djokovic and Federer break each other multiple times in their semi-final clash at the Australian Open.

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Fans were stunned at Federer’s level as he pushed the Aus Open favourite to a tiebreak.

But the Serbian went to another level and showed it with an incredible drops shot that had the crowd stunned.

Federer sliced the ball on an acute angle, forcing Djokovic to charge towards the left hand side of the net.

But instead of pushing the back, the World No.2 was able to lift it over the net and drop the ball short enough that the Swiss maestro hardly moved.

The umpires ruling over Federer/Nadal

Leading tennis analyst David Law has led the praise for Marijana Veljovic and Aurelie Tourte after their performances in umpiring Roger Federer and Rafael Nadal at the Australian Open.

Veljovic was in the chair for Federer’s win over Tennys Sandgren on Tuesday, while Tourte umpired Nadal’s loss to Dominic Thiem on Wednesday.

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And both women had to deal with some anger from tennis legends.

Federer grilled Veljovic after he was reported for an audible obscenity by a line judge, clearly not happy after Veljovic refused to back down about what was heard.