Ibrahimovic reportedly tackled Onyewu reckleslly, leading to a fight in which the two had to be separated by team mates.
Milan have played down the furore over the spat, with chief executive Adriano Galliani insisting that they have already put it behind them.
“The fight was animated, but the incident is over, I’m happy when I see players pumped up, I’m happier seeing fiery training sessions than boring ones.”
