Chelsea boss Luiz Felipe Scolari admits he has concerns over his players' ability in penalty shootouts.
The defeat to Lokomotiv Moscow is worrying Scolari, who said: "I need to change this mentality in the club where some players are afraid of penalties. I listen and I read Chelsea lost two or three competitions in the last season with penalties.
"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.
"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."