Arsenal boss Unai Emery was left disappointed with the pitch invader during their 2-0 win over Manchester United.
Emery was forced to address the incident after the superb win.
He said, "I don't want that, but it's not in my control. I think we can enjoy this with every supporter and today I'm very proud of every supporter who helped us, but I think we need to do this with respect."
On the game, Emery continued: "We were positive when we were struggling in the table and we took balance in our mind when we were worse - and now after these victories we can be positive, but it won't change our idea. We need to continue and it will be difficult, and our style and way and thinking will be game by game."