Andy Murray held off a spirited challenge from Grigor Dimitrov to advance into the last 16 of the Miami Masters with a 7-6 (7-3) 6-3 win.
The world number three was broken twice in the opening set and looked in danger of going behind in the match when he faced two set points at 2-5. However, he saved them both and then benefited from three double faults by Dimitrov in the next game.
Murray wrapped up the set on a tie-break as his Bulgarian opponent lost his grip on the contest.
Dimitrov was broken early in the second and appeared set to fall further behind when Murray was presented with two break points in the sixth game.
The world number 32 showed some fight, though, to thwart the Scot, before denying Murray twice more when forced to save match points. That only delayed the inevitable as he put a backhand into the net on the third to hand Murray the victory.
Murray admitted to the tennis betting news
that he was up against it in the opening exchanges and had to work hard to book his place in the next round.
"He was taking the ball early very aggressively and hitting very clean at the beginning of the match and I had to weather the storm a bit," said Murray to the sports betting news
; he will leapfrog Roger Federer into second place in the world rankings with a second tournament win in Miami.
"If you don't feel like you are playing at your best, you don't go for the lines, you just try to keep a good depth and hit the ball mainly crosscourt and make your opponent have to beat you. I did that in the first set."
Murray will take on world number 19 Andreas Seppi in the fourth round.