Andy Murray barely broke a sweat and kept his cool on the hottest day of the Australian Open yesterday as he strolled into the third round.

In temperatures over 32°C, Murray cooly beat Marinko Matosevic 6-1 6-3 6-2 in under two hours.

The Scot’s opponent was nicknamed “Mad Dog” but resembled more of a cute puppy as he rolled over easily without letting out much of a bark.

And the day got better for the former Wimbledon champion when 32nd seed Martin Klizan had to retire meaning world number 55 Joao Sousa will be Murray’s next opponent.

“I definitely started quite quickly today,” the Scot said. “I was timing the ball well on the return and serving well from the beginning of the match and it helped a lot because obviously the crowd were behind him. I managed to take the crowd out of it a little bit by starting that quickly.

“He did start off a bit slow. He made a few errors at the beginning of the match. But when I noticed his timing was a bit off I felt like I played quite smart and used a lot of variety; didn’t give him the same ball twice in a row.

“I’m pumped to be through in a fairly quick match as it was hot, especially when the sun was out.”

Murray went into this match 9-0 against Australian players and from early on win number 10 was never in doubt.

The Scot defeated Matosevic in the second round of the French Open last year and outclassed him once again here.

“I had no idea that was the case but with the players the Aussies have coming through I’m not sure I will be able to keep that record much longer,” he said.

Although at 29, Matosevic needs to significantly improve at the majors or he will be remembered mainly for his sexist views.

Back when Murray appointed Amelie Mauresmo, Matosevic was labelled “pig-headed’’ by compatriot Sam Stosur for saying he would never follow “political correctness” and do the same because he “didn’t think that highly” of the women’s game.

But Murray insisted he had no point to prove against Matosevic, who apologised to Mauresmo and Murray’s mother and former coach Judy after the story broke.

“I spoke to him a little bit about what he said. He didn’t mean any harm,” Murray said. 

“Everyone’s entitled to their opinion on anything. If he wants to get coached by a man, that’s absolutely fine. I have absolutely no issue with it at all.”