Milos Raonic is into the Australian Open quarter-finals after a 6-4, 6-3, 7-5 victory over Marin Cilic on Margaret Court Arena. Cilic lost his service game at a crucial moment in the first set, dropping it when he was 5-4 down with Raonic capitalising on his second break point of the match. And with Raonic a break up in the second, Cilic was forced to take a medical timeout for a lower back problem before the Canadian continued to dominate on his serve. With the third set locked at 5-5, Raonic broke at the clutch moment once again as he secured his place in the quarter-finals. Raonic, who reached the semi-finals in 2016, will play Novak Djokovic in the next round. "It was a rollercoaster," Raonic said in his on-court interview. "He [Cilic] was playing better than I was through most of the first set. "I got lucky to get that through and made a run with it and then things weren't converting and I got myself into a bit of trouble but I'm happy to be out here, playing well and feeling good. "I'm happy with how things are going and that I get to play another two days here. It's been an exciting tournament so far. When asked how he thinks he will get on against either Djokovic or Schwartzman, he replied: "I think I'm going to have to hit more than 35 aces."