Chelsea boss Antonio Conte says the quality of both sides means “anything can happen” in Sunday’s potentially crucial match at Old Trafford.
The game is hugely important to both teams in the battle for a Champions League place.
Speaking at a press conference on Friday afternoon, Conte said: “When you play Manchester United you have to know that anything can happen and there is a risk of losing because Manchester United are a really strong team.”
A win would move fourth-placed Chelsea level on points with second-placed United and give them a huge boost as they pursue a top-four finish.
“It is a massive game for us and we must put 120% of our strength in to try to get three points,” Conte said.
“We have to look at ourselves and understand that from now until the end of the season every game is very important for us.
“Three points are very important for us and for Manchester United because the run for the Champions League place is open and in this run there are many great teams and someone has to stay out from the next Champions League.”
Chelsea have no new injury worries but are still without Ross Barkley, Tiemoue Bakayoko and David Luiz.