Chelsea boss Luiz Felipe Scolari admits he has concerns over his players' ability in penalty shootouts.
"If you are talking about penalties some players refuse to take one. I need to change this. I am the coach and I am responsible for this. There are many games in the Champions League, Carling Cup, FA Cup which could be decided by penalties and I need all the players.
"Remember the World Cup. I was there. In 2004 in the Euros and in 2006 at the World Cup I was there. How can they overcome it? They need to work on it every day in training.
"I know its different taking penalties in Cobham to taking penalties in a game against Milan or Manchester United. There is pressure. But if you don't work in training, if you don't believe or concentrate in training, maybe you make a mistake in the game."