Former Chelsea coach Gianfranco Zola has questioned whether Tammy Abraham is ready to lead the line for the Blues.

Last season, the England Under-21 international spent the season on loan with Aston Villa and helped them get promoted.

Zola, who was assistant manager at Chelsea last season when Maurizio Sarri was in charge, believes Abraham will have to adjust to life in England's top flight at first.

“Maybe in the beginning he might suffer because you know the difference from the Championship and the Premier League is huge," he said.

“He will have to adapt but he has a lot of energy, he's positive.

“I think in the end he will get to the level he needs to be."