Now Zabaleta has admitted that life at the club is not the same without the 22-year-old, but wished him all the best in his career.
"Life is a bit different, Mario is a great lad and we're missing him the last three days," said the Argentina international.
"The dressing room is not the same, with him there's always something to laugh at.
"We wish him all the best at AC Milan, we know how good Mario is as a player he just needs to be more focused and he can become one of the best players for sure."
Balotelli could make his debut for Milan in tonight's clash against Udinese.