When Bologna managed to keep a clean sheet against Milan away from home, Zlatan Ibrahimovic ended up in a tough nod duel.
Ibrahimovic was substituted in the 70th minute and barely had time to play nine minutes before the knock.
The Swede went up in a nod duel against Bologna's midfielder Gary Medel in the penalty area and their heads merged.
They both fell to the ground and grabbed their heads.
Both players bled profusely and their heads had to be re-wrapped.
While Ibrahimovic was able to continue playing the match out while Gary Medel was forced to step down.
A heavy loss in the back line for Bologna but despite that Milan did not manage to get a hole in the away team.
It was an unexpected loss of points for the top team.