Andy Murray acknowledged that he was delighted with his performance as he outclassed Jo-Wilfried Tsonga to reach the last eight in Miami.
Defending the title he won last year, Murray has now won nine straight matches at the event and believes taking his opponent out of his comfort zone was the key to his 6-4 6-1 success.
"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.
"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."
Murray now plays Novak Djokovic in the quarter-finals - the first time the two men have met since the final at Wimbledon last year when the Scot famously prevailed at SW19.
"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."