Manchester City defender Kyle Walker says they'll keep watch on Manchester United forward Marcus Rashford tomorrow.
Rashford goes into the derby in poor club form.
But Walker said: I think Marcus has shown over the years that he's the sort of player who can create problems for any side if they don't match him.
He's been important for both United and England since he was a teenager because of the threat he offers to any team he's in. He's got a lot of different qualities and we know he can be dangerous at the weekend.
Of course this game means a lot but it's part of a bigger picture and, OK we lost last season and the luck didn't go in our favour, but we bounced back from that and did what we did."