Michael Ballack admits Chelsea are struggling in front of goal.
After their FA Cup victory over Ipswich, Ballack said: "It was a difficult game like it always is the FA Cup. We scored in the right moments with some nice goals. But we can still improve our game and play better, we know this.
"We try this every week but it is a difficult period for us at the moment. We have to go through it to get back to better performances. Sometimes it is just little things. Confidence and a little more relaxing in our game.
"It is a weakness at the moment - we have a lot of possession and create chances but we are not good enough in front of the goal to score goals and kill the game."