Nemanja Vidic says their derby defeat to Manchester City has sparked Manchester United's recent run of form.
Since that loss, United have chalked up four victories and a draw in Europe away from home.
"We're doing well right now and I hope we'll keep this momentum going," Vidic says.
"I want to play in the big games and win trophies; that's why I'm at Manchester United. Every game is crucial now and it's important we keep our shape and don't lose too many goals."