Andy Murray has claimed his 500th win on the ATP Tour by beating Kevin Anderson 6-4 3-6 6-3 in the fourth round of the Miami Open.

It was an impressive start to the match from the British number one as he immediately attacked the Anderson serve to claim a break in the opening game.

Anderson continued to look vulnerable on his own serve, but despite a couple of openings for the South African late in the set, Murray held his nerve to twice hold from difficult positions before taking the opener.

There was a much different pattern to the match early in the second set as Anderson started to grow in confidence from the back of the court, and he was rewarded with a break.

A string of errors from Murray on serve opened the door for the 15th seed, who capitalised to race into a 4-0 lead.

Murray would immediately hit back with a break of his own, but Anderson continued to improve on serve to force the match into a deciding set.

The two players traded breaks early in the third, before Murray took advantage of a poor service game from his rival to take the lead with another crucial break of serve in the fourth game.

Anderson was unable to produce a response to the latest setback, and Murray dominated the longer rallies in the latter stages to secure his progress in Florida.