Aston Villa boss Martin O'Neill admits it would be "devastating" for left-back Stephen Warnock if he is ruled out of the Carling Cup final through injury.
Warnock has been troubled by a shin problem in recent weeks and has now been advised by a specialist to rest for another fortnight before it is reassessed.
Villa will meet Manchester United in the final at Wembley on February 28 - barely a week after Warnock is checked out again.
He has been a key figure in Villa's push for a Champions League spot and cup success since his £7million move from Blackburn in August.
But Warnock has already missed Villa's last two league games with Arsenal and Fulham after being substituted early in the second half of the FA Cup fourth-round clash with Brighton 12 days ago.
O'Neill said: "Obviously it is worrying for Stephen and he has done so much to get us to the cup final. It would be devastating if he missed that. He has been splendid since he came here and got back into the picture with England."