Manchester United boss Erik ten Hag admits facing Manchester City always "feels different".
United host the latest Manchester derby later today.
Ten Hag said: Yeah, it's always different. Derby games against them, against top, top teams it's always different and that is for the players.
"They like such challenges, so we are more motivated. They have more energy. But of course, the fans, the ambience will be incredible. I'm sure the fans will be from minute one, [and] already long before the game, they will be so excited and they will be backing the team from top to finish, I'm sure.
What is form? For me, form doesn't exist. It's the form of the day. And so make sure you are, on the day, in the right form."