Videos: Man U surge ahead as Chelsea stumble

Chelsea may have surrendered their best chance of taking the Premier League title when they let Tottenham draw even with them after being ahead three times in the game.
They were ahead 1-0, 3-1 and 4-3 and then went and let Robbie Keane equalise two minutes from time to draw 4-4.A win would have taken them level with Arsenal and into second place.