Arsenal boss Arsene Wenger says if his players are switched on, they are capable of beating any team in the world.
"It is all about producing a good performance on the day. If we do that we'll beat everybody in the world," said Wenger. "So I will tell my players to go out and play with no fear."
He continued: "I believe we can beat anybody in any competition. It doesn't matter if it's Liverpool, Milan or anyone else.
"I believe in my team and the way we play football. I will let other people judge whether we are better than Manchester United. But I believe in my players."