Chelsea's lead at the top of the Premier League now stands at only four points and the title race is wide open again after they were well beaten by a resurgent Manchester United at Old Trafford.
United manager Jose Mourinho has suffered this season against the club where he was a three-time champion, losing 4-0 in the league at Chelsea and also going out of the FA Cup quarter-final at Stamford Bridge.
The Portuguese was not to be denied this time as Marcus Rashford, paired with Jesse Lingard up front while a jaded Zlatan Ibrahimovic was rested, finished coolly after seven minutes and Ander Herrera - detailed to do a brilliant man-marking job on Eden Hazard - saw his shot deflected in off Kurt Zouma four minutes after the break.
Zouma was a late replacement for Marcos Alonso, who pulled out in the warm-up, but Chelsea can offer no excuses here as they were second best throughout. Tottenham now trail them by four points with six games to go and have the superior goal difference.