The initial diagnosis was that the 29 year old would be sidelined for between four and six weeks, but Ranieri did not want to put a timescale on his absence.
"I don't know everything but last night he had an operation and the surgeon said everything is okay. Now it depends on how long. Of course the hands, as for a boxer, are very important," said Ranieri.
"I don't put a deadline on it because every man is different. Maybe two, three, five, six, maybe seven weeks - I don't know.
"On the night he felt something, it was pulsing, and it was unbelievable. Maybe with the adrenaline and concentrating he felt nothing.
"He made a good save and came and punched the ball, but it's unbelievable he didn't feel anything. Kasper wants to play on Sunday! But that is normal."