Tomas Berdych through to Miami quarter-finals as Gael Monfils retires

Tomas Berdych advanced to the quarter-finals of the Miami Masters as Gael Monfils was forced to retire from their fourth-round match this afternoon.

The eighth seed was a set up and had just broken to lead 3-2 in the second when Monfils threw in the towel following an awkward fall.

Berdych won the first set 6-3 after snatching the only break of serve in a set that he dominated.

The Czech will next face either Juan Monaco or 26th seed Fernando Verdasco in the last eight.