Andy Murray cruised into the quarter-finals at the Sony Open with a convincing straight sets victory over Jo-Wilfried Tsonga.

The defending champion looked impressive from the off but had a scare when he called for the trainer in the first set although he still closed out after breaking Tsonga early.

The second set was a straightforward affair as Murray eased to a 6-4 6-1 victory and set up a meeting in the next round with Novak Djokovic.

Murray broke Tsonga in just the third game and was playing some impressive stuff as he moved into an early 3-1 lead before he appeared to run into trouble in the fifth. The Scot had five break points but lost the game and appeared to be in some discomfort.

The next two games went with serve before the Wimbledon champion called for assistance and, although he spoke with the trainer, he did not have any treatment and when the action resumed the remainder of the set also went with serve.

In a repeat of the first set, Tsonga was again broken in the third game and Murray showed no signs of his earlier problems as he largely dominated proceedings with his forehand.

That domination continued as Murray won all the remaining games, at one point taking 14 points in a row, and eased his way into the last eight.

Murray was pleased with his performance and felt that the key to the win was taking his opponent out of his comfort zone.

"I served well, I didn't give him any opportunities on my serve at all, and then as soon as the ball was short I attacked him," he told Sky Sports 3.

"I came forward, I kept him away from the net which is where he likes to be. That's when he plays his best tennis, when he's the one coming forward, so I kept him pushed back on the baseline.

"I made very few unforced errors and it was a good match."

The quarter-final against Djokovic will be the first time the two men have met since the final at SW19 and Murray feels he is getting to his best form at the right time.

"I'm looking forward to it, it's a great test for me," he added.

"I think my game is kind of close to where I want it to be right now and he's obviously playing very good tennis again, winning last week and he's been pretty comfortable so far here.

"It's always a fun match up against him and we've played here a few times so it'll be another tough one."

Murray also confirmed he will speak to his medical staff about the discomfort in the first set, although he does not believe it held him back.

"I'm not sure, I haven't had it assessed yet so I'll go and see my physio when I get off the court, have a chat about it, and see what the problem is," he added.

"I was still moving well, it was just painful. I thought I moved pretty well at the end at the match and loosened up as it went on."