"It has sometimes happened this season. When you don't close out the game, the opposition have got a chance if they score."
"We are confident," he said. "We have shown we have the ability to play very well, as we did in the first half. We know we can beat them at the Bridge."
Striker Drogba agreed, adding: "We created a lot of chances which is good for the second leg, we know we will have a lot of chances but we have to score them."