Arsene Wenger has been fined and warned about his future conduct by the Football Association following his touchline spat with Alan Pardew.
The Gunners manager pushed the former West Ham boss at the end of the November Premiership match which the Hammers won 1-0 with a late goal.
Frenchman Wenger, who admitted the charge of improper conduct, was fined £10,000 for his aggressive behaviour.
Pardew has denied the charge against him and requested a personal hearing.
"I got fined severely. I'm not happy with it but I said I regret it and I was over-reacting, so I accept the fine," Wenger reflected.
The two managers had to be separated following celebrations by Pardew in the technical area after Marlon Harewood's winner.
Wenger refused to shake Pardew's hand at the end of the match, and left without speaking to the media.
606: DEBATE
Pardew, who was sacked as Hammers boss on Monday, issued his apology to Wenger after the victory.
"I apologise if I offended Arsene. If I was over-zealous in my celebrations, which I'm sure I was, I apologise fully to Arsene and Arsenal," he said.
"It was nothing personal, I was celebrating the goal. I've got great respect for him and that won't change.
"Nothing was said. Maybe he was angry at a couple of decisions and it was a physical game. We wanted to upset Arsenal, we wanted to win.
"He is a top guy and I really respect him. I thought I was entitled to celebrate the goal after a pulsating game."