One game back and Balotelli already throwing Man City wobbler
The Italian striker spat his dummy out by throwing down his snood and storming off down the tunnel.
But boss Mancini said: "We decided before the game to replace him after an hour. It's his first start after injury and he had a clash of heads.
"He was unhappy but I will explain to him in a couple of days.
"It's not a problem. We want him fit for the next two months as we have a lot of games.
"He played well and didn't have any problems with his knee."