Marcus Rashford opened the scoring after seven minutes with a clever finish, having been played through on goal by Ander Herrera who appeared to handle the ball in the build-up.
League leaders Chelsea suffered an unexpected setback losing 2-0 to Manchester United at Old Trafford last evening.
The result extended United's unbeaten run in the league to 22 matches and moved them up to fifth in the table, four points behind Manchester City with a game in hand.
Chelsea manager Antonio Conte has claimed that the Premier League title race is now a 50-50 battle between his side and Tottenham Hotspur. "We did that at Stamford Bridge when we played with 11, with 10 it was more hard and today we control". So far it has been OK for me, but I still have to show I can give more. Over 32 games they've proved themselves the best team in the league, they're still top, and have more than enough to get the points they need to become champions.
In quotes featured in the match programme for the Chelsea game, Herrera praised Mourinho, revealing how the manager had told him before the season had started that he would be an important part of his first United side - something which filled him with confidence.
"That game was totally controlled when we played with 11 players, and only the decision that made us play with 10 players gave Chelsea a chance to be dominant", he said.
The Red Devils were in superb form as they outplayed the Blues at Old Trafford and secured the three points to keep their top-four hopes alive. His players were enthusiastic students and it probably sums up the way Chelsea were rattled that N'Golo Kanté, of all people, was responsible for losing the ball in the build-up to the second goal.
Conte said the title remained a "fantastic target" for his players and again reiterated it would be an incredible achievement after last season. When you beat the leader it is obviously a very good feeling. "There have been a lot of draws at home". But it is a great feeling to know it is hard for us to lose a match.
"I can not give up on the Premier League yet - we have to try".
"We went to Stamford Bridge in the FA Cup with the same tactics (when United lost 1-0)".