Andy Murray came out on top after a gruelling encounter with Italy's Fabio Fognini

But the Scot cast fresh doubts about his fitness as he admitted he is still not moving well.

The world no1 and defending champion saved five set points and fought his way back from 5-2 down in the final set to clinch a gripping 6-2, 4-6, 6-1, 7-5 win over flamboyant Italian Fabio Fognini.

Murray, who struggled with a hip problem in the build up to the tournament, said: "I didn't feel like I moved as well as in the first two matches.

"It was a completely different match. There were a lot more rallies and I felt a bit off balance. I didn't feel I moved particularly well.

"I don't know if it was because of my hip, hopefully it will be a bit better from now on. Physically I though certainly could have played a fifth set. I finished strongly."