Manchester United suffered consecutive home league defeats for the first time since 2002, as Newcastle earned a first win at Old Trafford since 1972.
Yohan Cabaye swept home the only goal, moments after Patrice Evra headed against the post for the champions.
Javier Hernandez and Adnan Januzaj had efforts saved, before Robin van Persie’s header was adjudged offside.
After the midweek defeat by Everton, David Moyes’s side sit 12 points adrift of Premier League leaders Arsenal.
Chris Waddle, BBC Radio 5 live at Old Trafford
“United have had the odd bit of quality but over the course of the 90 minutes they have not been good enough.
“I have been very impressed with Newcastle they have been organised and well-drilled but United look lacking in leaders and confidence and need to do more in the middle of the park, where they are lacking in creativity.”
3 – Manchester United have lost consecutive home games without scoring for only the third time in PL history (Dec 01, May 02). Panic.
— OptaJoe (@OptaJoe) December 7, 2013
Here’s more from Newcastle United manager Alan Pardew: “I think it is difficult for David and the club, he is a great manager. It is very important the fans and the board stick with him. He has proven he will be great for this football club. David is big enough to stand up to that.”
Newcastle’s Chieck Tiote: “We knew it would be difficult to come to Old Trafford and win. We think we played well and that is why we won the game. The second half was difficult for us because they tried to create chances but we stayed compact. We kept the ball and that is why we won the game.
“When you win a game you get confidence. We beat a lot of good teams, the key in our team is we play together, we work hard and we close down. That is a big, big win, we will never forget that.”