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 (Saturday) to the specialist neuro-surgical unit. He underwent surgery for a depressed fracture of the skull."
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