Novak Djokovic is on course for a sixth Miami Open title following his 6-3 6-3 quarter-final victory over Tomas Berdych.

The world number one broke twice during the first set to take control of proceedings, before he was gifted a break early in the second set as Berdych sent a routine smash into the net and then double faulted.

There was then a moment of concern for Djokovic when he was forced to call for the trainer to receive treatment on a back complaint.

However, once he had returned to the court, the Serb was able to record his 10th straight win over Berdych with relative ease.

Djokovic, who has won this tournament in each of the last two years, will now take on Belgium's David Goffin for a spot in the final.