Andy Murray insists he is willing to put his body on the line again to keep Great Britain on course for Davis Cup glory when it faces Australia in the semifinals.

Murray played through pain to grind out a 4-6, 7-6 (5), 6-3, 6-0 victory over France's Gilles Simon on Sunday that secured Britain's first last four appearance since 1981.

The world No 3 was mentally and physically fatigued after a grueling period that saw him reach the Wimbledon semifinals before losing to Roger Federer.