Newcastle won a Premier League home game for the first time since October with a surprise victory over second-placed Manchester United.
Matt Ritchie scored the only goal in the second half as the Magpies climbed out of the relegation zone and left the visitors 16 points adrift of leaders Manchester City.
And the hosts could have had a first-half penalty when Chris Smalling tripped Dwight Gayle.
That said, the Red Devils missed a string of chances to take something from a ground where manager Jose Mourinho is yet to win a league match.
But debutant Martin Dubravka was excellent in the Newcastle goal, denying Jesse Lingard, Anthony Martial and Ashley Young.
More to follow