Nadal survives Del Potro battle

Rafael Nadal displayed nerves of steel and demonstrated all the qualities of a champion as he kept his Wimbledon title defence alive by coming through a compelling and brutal fourth-round battle with Juan Martin Del Potro.

The Spaniard faced set points, injury problems – he feared he may have broken a bone in his foot at one stage – and was comprehensively outplayed by his opponent at times.