Former Manchester City boss Kevin Keegan admits the enigma of Mario Balotelli could become an issue.

But KK admits he's a big fan of the Italian.

He told the Daily Express: "Is Tevez going? Is he staying? It is draining to deal with. He's also got players like [Mario] Balotelli. He could win City the League but he could cost them it as well. He's one of 'those' players. I saw him at Chelsea where for half an hour he put on the best display I've ever seen from a forward away from home. He was brilliant. But the next 60 minutes? Nothing!"