Ole Gunnar Solskjaer says Manchester United need to find the right balance and keep their emotions in check when they take on Manchester City on Sunday.
The two sides know each other very well, with the Premier League set to see the fourth Manchester derby in as many months this weekend.
United have the upper hand having won two of the three meetings so far this season, but Solskjaer is keen for his side to learn from their 3-1 defeat in the Carabao Cup in January, when City were far superior to their hosts at Old Trafford.