AC Milan goalkeeper Christian Abbiati will be out for up to six months after undergoing surgery on his cruciate knee ligaments.
Abbiati damaged his right knee in the early stages of Milan's 5-1 victory over Siena on 15th March and was immediately sent to see specialist Marc Martens in Belgium.
Brazilian Dida replaced the stricken shot-stopper against Siena and is expected to remain as the club's No.1 for the remainder of the season with Zeljko Kalac in reserve.
A statement on the club's official website said: "AC Milan can confirm that Christian Abbiati underwent surgery under the care of Professor Martens' team.
"The cruciate ligament of his right knee was rebuilt and the operation was a success. The recovery times are evaluated to be around five to six months."
On top of missing the remainder of this season, Abbiati will still be working his way back to full fitness at the start of the 2009/10 Serie A campaign.