Andy Murray played down concerns about his shoulder after he advanced past Andreas Seppi into the fourth round at Wimbledon.

Murray's campaign looked in danger when he lost five straight games to Seppi to hand the third set to his Italian opponent.

Despite also losing the opening game of the fourth set - the sixth in a row - Murray took advantage of a medical time-out to get some work done on his back and shoulder, before winning six consecutive games of his own to complete a 6-2 6-2 1-6 6-1 victory in two hours, 10 minutes.

When asked about his shoulder at his post-match media conference, Murray said: "It's something I had the last two, three days. I only really feel it when I'm serving but it's not something that's of major concern to me.

"It's stiffness, and every time I finish a practice or anything, I have my back manipulated.

"The physio came on the court and said it was like a machine gun going off when he laid on top of me. Literally my back cracked a lot. That's been the case for the last few days."

The British third seed, who will face Croatia'sIvo Karlovic in the next round, said that it was ironically a medical time-out to Seppi that sparked the issue.

Seppi asked for medical assistance for his ankle after the third game of the third set, and Murray lost his next three games on serve.

"Obviously when you do take a break, it does stiffen up, and my serve was pretty bad after that happened," the 28-year-old Brit said.

"Once I had the treatment, I served much better."

Asked whether restrictions should be placed on time-outs, Murray added: "It's a tough one to say. That's the first time-out I've had this year.

"I've played 50 matches, maybe I've played more than that, but somewhere around there, and I very rarely have a trainer on the court. I'm aware sometimes that if players go off the court to get treatment or at the end of the set it can become 10 or 15 minutes.

"The match before us that happened at the end of the second set, it was like a 10, 15 minute break and you obviously feel like that's too long. I guess everyone can kind of do without them, it's hard to say and have an exact ruling."