Chelsea are now four points clear at the top of the Premier League table after they drew 1-1 with Manchester United at Old Trafford.
United are still 10 points behind the Blues, but it could have been a lot worse for the home side.
Didier Drogbra broke the deadlock with a near post header from a corner on 53 minutes.
The Blues controlled the game from there, and it looked as though they would cruise home with the three points.
But United got a second wind and were on the front foot for the last 10 minutes.
Branislav Ivanovic was sent off in the 93rd minute for a second bookable offence.
And from the resulting free kick, Robin van Persie poked home to earn United a valuable point.