Goalkeeper Petr Cech underwent surgery for a depressed fracture of the skull after being knocked unconscious in Chelsea's victory at Reading on Saturday.
Cech was injured in a first-minute collision with Stephen Hunt at the Madejski Stadium and his replacement, Carlo Cudicini, was also later knocked out following a collision with Ibrahima Sonko.
A statement from Chelsea, released to PA Sport, read: ‘Chelsea Football Club can confirm that Petr Cech was transferred to the Radcliffe Infirmary in Oxford last night to the specialist neuro-surgical unit.
‘He underwent surgery for a depressed fracture of the skull.
‘The operation was successful but it is too early to give an accurate assessment of his condition.
‘Naturally everybody at Chelsea wishes Petr, and Carlo Cudicini - who was discharged last night after being knocked unconscious - a speedy recovery from their injuries.
‘Chelsea FC has reviewed the video of both incidents. We endorse the post-match comments of Jose Mourinho regarding the seriousness of these incidents.
‘Chelsea will be writing to the Football Association with our observations.’
