Alex McLeish has warned Birmingham striker Garry O'Connor that he must mature 'very quickly' if he is to play a part in his St Andrews reign.
McLeish said: "Garry's got to mature very quickly - and knows we won't accept anything that is against what I see a professional footballer should be all about.
"There's no doubt Garry has the ability.
"He can shoot with both feet, he's decent in the air and he's mobile. He's got all the attributes.
"But it's up to the player himself to get it all together and have the mind, that positive mind, to pull it off at the top level."