CONFIDENCE does not appear to be an issue for Andy Murray at the moment but if he is looking for some reassurance that he is on the right track, he got it yesterday in the words of one of the sport's most famous coaches.

Nick Bollettieri, the man who has produced 10 world No.1s, said he expects the Scot to be back to his best in 2015.

Murray was untroubled on his way to a 6-1, 6-3, 6-3 win over Marinko Matosevic of Australia, cruising through in one hour, 42 minutes, crucially conserving energy for the more tricky encounters to come.

Fully fit again after a year in which he struggled to find top form after back surgery in late 2013, Murray has looked ultra-sharp here at Melbourne Park, where he has reached the final three times.

And Bollettieri, who helped discover Andre Agassi, Maria Sharapova and Monica Seles, believes 2015 could see the two-time grand slam champion back to his very best.

"I think this is going to be a good year for Andy," Bollettieri told Herald Sport.

"Last year he was never really over his injury. His game is based on movement and balance. He's much closer to the baseline - you can't win from 10 feet back.

"The big question for me will be his second serve. Go for it. You might as well goddamn double fault. But if he hits a bigger second serve, that would be huge.

"He's attacking more and he's a very good at the net. Nobody moves better than him, nobody returns the ball better than him and he's in great shape physically. He's physically fit and I believe that his mental attitude this year is excellent."

In contrast to periods of 2014, Murray has looked happy and content off the court and not wasting any energy on it.

Tomorrow, Murray will play world No.55 Joao Sousa, a Portuguese whose claim to fame - or perhaps non-claim to fame - is that he shares an agent with Jose Mourinho, but has never actually met the Chelsea manager.

The pair have played three times and Murray has won the lot without losing a set each time.

In the build-up to the Australian Open, Jamie Baker, the now-retired former Davis Cup player and a contemporary of Murray's, told The Herald he felt his old friend had taken time, mentally, to get over his 2013 Wimbledon triumph.

Yesterday, Australian coach Darren Cahill, who has worked with Murray at times, asked the Scot the same question when he popped into the ESPN studios.

"Yes, I was very open about it, but I found the first three or four months after I won Wimbledon very challenging," Murray said.

"I expected to be really enjoying my tennis after that but I found it a bit stressful, which is strange.

"After I had my surgery, I started to forget about Wimbledon and focus on recovering from surgery, which is hard in itself."

Sousa has been mentored by Francisco Roig, Rafa Nadal's assistant coach, throughout his career and said he might ask for a few tips before their third-round clash.

But Murray told ESPN he is feeling relaxed on and off the court, his back feels better and that he hopes that feeling will translate to results this fortnight.

"My immediate goal is here," he said. "I know that when I play my best I feel confident I have a chance (to win slams)."