Andy Murray promises to step up

Andy Murray insisted he is playing well enough to beat Juan Martin Del Potro in the third round of the French Open after battling past Martin Klizan.

The world number one needed three hours and 35 minutes yesterday to defeat the world number 50 from Slovakia, eventually coming through 6-7 (3/7) 6-2 6-2 7-6 (7/3).

It was a very patchy performance from Murray, who started poorly and then got himself into trouble again at the start of the fourth set before mounting a comeback. The victory set up a clash with former US Open champion Del Potro, who is still working his way back up the rankings after wrist problems that almost ended his career.