Liverpool legend Graeme Souness believes Mario Balotelli could blow the title for Manchester City.
Souness wrote in the Daily Star Sunday: "He could hit the back of the net - or he could head for the tunnel.
"I'm concerned that hot-headed Balotelli could cost City dearly in their title race with Sir Alex Ferguson and Manchester United.
"To me, the Italian is a liability because you have got no idea what you are going to get from him.
"Against Sporting Lisbon on Thursday he could very easily have been sent off in the first half.
"Throwing his arms in the air, shouting his head off, kicking the ball high into the stands when something else didn't go right for him.
"Surely Balotelli needs to grow up - and quick. I am genuinely concerned that he could cost City dearly in this crucial part of the season.""After seeing Manchester City exit the Europa League - after a dreadful first half and great second half on Thursday - I worry.