Manchester United boss Erik ten Hag says they no time to dwell on defeat at home to Manchester City.
United now have a midweek Carabao Cup tie with Newcastle United in midweek.
Ten Hag said: "When you play against this team, everything has to be perfect. So you don't need help but also you don't want anything against you.
"Today was not our day. We have to accept that but don't forget the game-plan was very good in the first half. It hurts a lot. As you say, losing the derby is horrible. It could have been going a different way but it didn't. Now you have to deal with it.
"Accept it, how it is, and, in 24 hours, you have to get up and go the next game [Newcastle in the Carabao Cup on Wednesday]."
