Rome - AC Milan goalkeeper Christian Abbiati successfully underwent knee surgery Monday in Belgium and began rehabilitation expected to last six months, his club's website reported.
Abbiati, 31, damaged the cruciate ligament in his right knee clashing with team mate Giuseppe Favalli on March 15 during a Serie A game against Siena.
A similar operation could be necessary for international striker Antonio Di Natale, who was stretchered off the pitch Saturday as Italy beat Montenegro 2-0 in a 2010 World Cup qualifier.
