New Chelsea boss Mauricio Pochettino admits Wesley Fofana's injury is a heavy blow.

The French defender has suffered an ACL injury.

Pochettino said: “We feel sad for [Wesley] for him first but then because he is an important player for the squad.

“We have to think and see if we stay how we are or whether we need to work to add a player but it is not sure.

“With Levi, we were talking. It was a nice talk. It is important that they need to know us.

“To know what we think, to see that the competition will be tough but to challenge for that and know they can be in the starting XI because football is about competing.

“They understood and we understood what they wanted to translate to us. All is clear and we are happy with all the players we have in the USA."