Chelsea No2 Gianfranco Zola admitted some relief after their 3-2 Carabao Cup victory over Derby County.

Zola admits Derby pushed them all the way.

He said, "It was a tough game tonight. They were excellent. They created us more problems. Our defence wasn't as good as other times. But most of the problems were created by them.

"We were in control until about 10-15 minutes to go. In those moments we thought about scoring too much. When you open up against a team with that quality, it is 50-50. We were lucky on occasions.

"We are in a moment when we are trying to establish our philosophy and the game we play. There is a trophy. We want to try to win it so we will take it seriously."

On drawing Bournemouth, Zola added: "There are no easy games. They did really well [against Chelsea in the Premier League] and were unlucky on a few occasions. They should have scored."