AC Milan will not lodge a complaint with UEFA after Nelson Dida was confronted by a Celtic supporter during the 2-1 defeat in Glasgow.
In injury-time of the Champions League group game, the Milan keeper was caught by a fan, who came onto the pitch to celebrate Scott McDonald's winner.
Dida was stretchered off after the incident, but Milan vice-President Adriano Galliani confirmed the holders will not pursue the matter.
"I've just spoken with president Silvio Berlusconi," Galliani told Sky Sport Italia. "We are the European champions, we will soon represent Europe in the clubs' World Cup and we have decided not to appeal.
"We won't appeal, even if it's not a good thing that a supporter cound enter the pitch.
"Dida? The person who entered the pitch hit him on the cheekbone, then I know nothing else."
Milan coach Carlo Ancelotti added: "I haven't spoken with Dida and I don't know what happened, and I can say nothing.
"Anyway, I think that it is a grave thing because a fan can't enter the pitch."
UEFA director of communications William Gaillard told BBC Sport that the reports from the referee and match delegate had to come in before European football's governing body could open an investigate.
Source: Sky Sports / C4 Football Italia