Andy Murray has hit back at former Davis Cup captain David Lloyd for saying that the world No. 4 needs to improve his once court appearance and shave more frequently.

"I don't think it makes any difference, guys like [Bjorn] Borg didn't shave for weeks and months until they lost," Murray said at a Davis Cup press conference in Glasgow. "I heard what he said yesterday and I used to actually practice at one of his clubs, in Renfrew, I think. He's entitled to whatever his opinion is, but I think he should stick to what he does best and that's building leisure clubs. It doesn't make a difference, it's whoever works the hardest, whoever plays the best wins the matches and that's all that's important."