Chelsea boss Graham Potter admitted he will be without Denis Zakaria for the foreseeable future.
The Swiss midfielder was unable to play during their 1-0 win over Crystal Palace at the weekend.
Zakaria was impressive with Chelsea, but came off during their recent loss to Fulham with an injury.
After the win over Palace, Potter was asked about the defensive midifelder's condition.
He stated, “Denis is going to be probably four weeks. It's the top of his quad and that is a blow for us.
“Hopefully, he can return sooner."