Manchester United's first loss at home to Norwich in more than 26 years heaped more pressure on manager Louis van Gaal on Saturday.
Norwich won 2-1 with goals either side of halftime. United didn't score until more than an hour into game, and couldn't prevent falling to Norwich at Old Trafford for the first time since Aug. 30, 1989, three years before the English Premier League began.
United dropped to fifth in the standings, nine points behind leader Leicester.
Striker Cameron Jerome evaded two challenges before beating David de Gea in the penalty area for the opening goal, then Jerome, on a breakaway, threaded the ball to Alexander Tettey, who beat De Gea with a low shot inside his near post.
Anthony Martial lashed in United's reply from close range.