MILAN -- AC Milan veteran striker Filippo Inzaghi will likely miss the rest of the season after tearing the cruciate ligament in his knee Wednesday.

Inzaghi, 37, was injured 15 minutes after entering as a substitute in a 3-1 win over Palermo that lifted AC Milan to first in Serie A. Tests on Thursday showed the damage, which will require surgery.

He has played less than three full games based on minutes, but had four goals in those eight short appearances.