The defending Australian Open champion Novak Djokovic is through to the last eight for the 12th time in Melbourne following a 7-6, 4-6, 6-1, 6-4 victory over Milos Raonic, keeping his perfect score against the Canadian. Djokovic lost serve once from three chances offered to Raonic, seizing three breaks in sets three and four that carried him over the top.
Djokovic provided six comfortable holds in the opening set to continue where he left against Taylor Fritz from the moment he suffered a break in the fourth set's early stages. Milos saved two break points to reach the tie break that he lost 74 to send Novak in front.
The Serb held at 15 with an ace in game six for 3-3 after 22 minutes and created the first break chance a few minutes later. Raonic saved it to remain on the positive side and did the same at 4-4 when he got out of jail with a service winner.
Novak had the upper hand in the tie break and won it 7-4 after forcing Milos' errors, moving a set in front after 56 minutes. Both players wasted one break opportunity in the second set's games two and three, and it was Raonic who grabbed his only break in game five to move in front.
Novak Djokovic will face Alexander Zverev in the Australian Open quarter-final.
The Canadian closed the sixth game with an ace and held after deuce in game eight to remain in front. Serving for the set at 5-4, Milos held at 15 to seal the set and extend his chances.
Determined to get back on the winning road, Novak produced four powerful holds in set number three and scored a double break for 6-1. Djokovic earned a break in the fourth game when Raonic sprayed a forehand error and held after deuce in the next one following Milos' backhand mistake to confirm the lead and move 4-1 ahead.
Dominating in those moments, Novak placed a deep return that Milos failed to control for another break in game six and closed the set with a volley winner at 5-1 to become the favorite ahead of set number four. Raonic couldn't gain anything on the return, and his serve was in danger already in the third game when Novak earned two break points.
The Canadian saved them to stay in touch before Djokovic grabbed a break at 4-4 that sent him in front. Serving for the victory at 5-4, Novak sealed the deal with a service winner, advancing into the quarters and setting the Alexander Zverev clash.