Manchester City defender Pablo Zabaleta admits teammate Mario Balotelli can be infuriating.
Zabaleta concedes Balotelli has a temperament problem.
"If you could connect his quality to his brain he'd be one of the best players, believe me," said Zabaleta, in an interview on City's review of the season DVD.
"He could score the best goal in the history of football or he could get a red card five minutes after coming on to the pitch," added Zabaleta. "You play football from your feet to your head but his brain is gone."