Novak Djokovic outclasses Alex De Minaur to reach last eight at the Australian Open

Novak Djokovic was firing on all cylinders as he dismantled home favourite Alex De Minaur to reach the quarter-finals of the Australian Open for the 13th time.

The nine-time champion's damaged left hamstring has dominated discussion around his chances of triumphing again at Melbourne Park but there were no signs of discomfort here as he stormed to a 6-2 6-1 6-2 victory with a ruthless display.

It was a very uncomfortable evening, though, for De Minaur, the last remaining home singles hope, on Rod Laver Arena as he was outplayed in all areas.

Djokovic will now meet Andrey Rublev rallied back from the brink to edge Holger Rune and book a second quarter-final at Melbourne Park courtesy of a lucky net cord on match point that sealed a 6-3 3-6 6-3 4-6 7-6 (11-9) cliffhanger.

Fifth seed Rublev had to do it the hard way, having been 5-2 down in the final set at Rod Laver Arena and needing to save two match points to take contest into a 10-point tiebreak of unrelenting tension.

He slipped 5-0 behind in the breaker but roared back to lead 9-7 before ninth seed Rune saved two match points in a late twist.

It took the net cord to separate them, with Rublev's final return clipping the net and popping over on the third match point, leaving the Dane no chance.

"(Tennis is) not a rollercoaster, it's like they put a gun to your head," Rublev said on court. "I think a rollercoaster is a lot easier, man.

"I never in my life was able to win matches like this, this was the first time in my life I was able to win a match like this."