Aston Villa boss Martin O'Neill has heaped praise on the recent form of midfielder Stiliyan Petrov.
O'Neill told Villa's website: "He's been a revelation in the last few weeks and you can actually see his confidence returning. He's now doing things in games and in training that I knew he was capable of.
"I'm particularly pleased for him because he's had to win people over. He's had to battle through. At Celtic it was much easier - not easier to play in the games - but easier in the sense that he was still the young and up and coming lad in the side. He never really lost that tag.
"Here he's come in as a mature player trying to play in the Premier League, trying to win people over. That's taken time and I'm pleased for him.
"He can strive on from this and when he's in the sort of form and the mood we've seen in recent weeks he can spark the players around him. That spring in his step can be infectious."