Sergio Aguero and Vincent Kompany are both in contention to play against United

"We have to think about it. Normally the young players have to be involved when the team is in a good moment, but we haven't won for five games. To put four, five young players in at this moment is not a good idea. We have to protect them.

"But we will see. We might not have options, and I will have to put them in."

City were 2-1 winners in the Premier League clash at Old Trafford in September but Guardiola is expecting an equally tough match despite both sides being anticipated to make considerable changes.
He said: "A derby is a derby. It's always special. We are not going to play just a game. We are going to play seriously, like always, and try to win the game.
"I always expect the best from United, not because they lost at the weekend. The quality and the experience of Jose, and it being Manchester United, means a lot. They are always a good time."