Inter midfielder Arturo Vidal is to undergo surgery on his left knee.
The Serie A leaders announced on Thursday that Vidal has been suffering from meniscus pain.
The experienced Chile international will be treated at the Humanitas Institute in Rozzano on Friday.
Vidal, 33, has made 30 appearances in all competitions for Antonio Conte's side this season, scoring two goals and providing one assist.
The former Juventus star has won 1.2 tackles and 5.2 duels on average per 90 minutes this season. Among Inter midfielders, only Nicolo Barella (six) averages more successful duels per game.
The Nerazzurri, who are six points clear at the top of Serie A, face Torino away from home on Sunday.