Chelsea defender Cesar Azpilicueta has suffered a double cheek bone fracture picked up in the 0-3 win over Crystal Palace.
The Spaniard was caught accidentally by the boot of Eagles striker Frazier Campbell just three minutes into the clash at Selhurst Park on Sunday.
Although Azpilicueta managed to play for the full 90 minutes following the injury, he will have to play with a face mask similar to that worn by Blues midfielder Nemanja Matic.
However, the full-back joined the squad at Cobham earlier on Wednesday as Guus Hiddink’s team reassembled for training.
It is unclear as to how long it will take for Azpilicueta to fully recover.