Chelsea striker Tammy Abraham says they've learned from defeat to Valencia in the Champions League earlier this season.

Chelsea are at the Mestalla tonight and they cannot afford to lose if they're to reach the knockout phase.

"Before the Valencia game it was myself, Mason and Fikayo warming up together and it didn't feel real then," he said.

"We were all in the Champions League together, hearing the music and we all said to each other we were in the Championship the season before so it's a dream come true for us.

"The little details cost us the game but from then we've had to learn and develop our game in different areas. This is an important competition for us so tomorrow is a massive game. We just have to go out there focused and leave it all on the pitch."