Aston Villa's in-form midfielder Steve Sidwell is a doubt for Saturday's Barclays Premier League clash at Blackburn after suffering a thigh problem.
Sidwell sustained the injury during the warm up before Wednesday's Carling Cup clash with Cardiff at Villa Park.
The former Chelsea player had a difficult first season at Villa but has relished being played on a regular basis alongside Stiliyan Petrov during the current campaign.
Villa manager Martin O'Neill said: "I've got a bit of concern with Steve Sidwell. He played splendidly against Portsmouth on Saturday.
"I was going to keep him back on the subs bench against Cardiff but in the warm up he felt his thigh.
"Even though he was down as a sub on the list, he could not have come on. It was getting sore as he was on the bench so that is be a bit of a concern."