Murray battles into US Open semi-final

Andy Murray will play in his first grand slam semi-final after beating Juan Martin Del Potro in an astonishing four-hour epic at the US Open on Wednesday.

The British number one looked set for a straight-sets victory but Argentinian teenager Del Potro mounted an inspired fightback before Murray eventually triumphed 7-6 (7/2) 7-6 (7/1) 4-6 7-5 at Flushing Meadows.