Manchester City have announced that new signing Mario Balotelli will have knee surgery and could be sidelined for six weeks.
Balotelli made his long-awaited move to Eastlands from Inter in mid-August but, having made an instant impact with a goal on his debut against FC Timisoara, he sustained an injury in the same match.
A statement on the club's official website read: "Striker Mario Balotelli is to undergo surgery on his injured knee that could rule him out for up to six weeks.
"The Italian's injury is to the lateral meniscus, one of the two most crucial structures in the knee, and medical wisdom is to try and encourage the problem to heal without recourse to an operation.
"It was hoped that the symptoms would settle down but, once Balotelli began to step up his recovery programme this week, it became clear that action would need to be taken."
Balotelli has now flown back to Milan for the operation.