Australian Open day five AS IT HAPPENED: Casper Ruud wins in straight sets clinic; Special Ks knocked out as Jason Kubler and Marc Polmans progress after all-Aussie showdown

Thanks for tuning into Wide World of Sports' LIVE coverage of day five of the Australian Open.

Catch you in the morning!

Casper Ruud is through to the third round of the Australian Open.

He was the last match tonight and defeated Jaume Munar 6-3, 7-5, 6-4.

The former world No.13 did it with relative ease and will play Marin Čilić next.

For the second year in a row, it's a first round knockout for Nick Kyrgios and Thanasi Kokkinakis.

More importantly, Jason Kubler and Marc Polmans are through to the second!

Final score is 6-4, 4-6, 7-6(10-4).

Jason Kubler has been ON with his reviews.

And he did it again when he thought Kokkinakis hit the ball before it went over the net.

He was right and that gifted Kubler and Polmans a 3-1 lead.

Well it's time for a tiebreak!

Nick Kyrgios is lucky to not have been penalised after some frustration showed.

He managed to keep himself in check though and simply just slapped his thigh.

It's 5-5 in the final set now after the hold from Kubler and Polmans.

It's also been noted there's some limping coming from Kyrgios.

He has heavy strapping on his left knee and an ankle guard.

Thanasi Kokkinakis has held on his serve!

And there's a massive grimace on his face after it.

It's 5-4 in the final set.

But which Aussies?

Jason Kubler and Marc Polmans.

They've gone bang, bang and broken the serve of Nick Kyrgios.

Kubler and Polmans are on serve now at 3-4.