United shaded a thoroughly entertaining top-of-the-table clash at Chelsea with Javier Hernandez netting the winner after the Blues were reduced to nine men.
Chicharito's fifth strike against the West Londoners means he has more goals against them than any other opponents and it secured three vital points after the Reds had surrendered an early two-goal lead. A David Luiz own goal and Robin van Persie's clinical strike were cancelled out by Juan Mata and Ramires either side of half time.
In the second half, Branislav Ivanovic was red-carded for a professional foul on Ashley Young before referee Mark Clattenburg dismissed Fernando Torres for a second bookable offence - diving in a bid to win a foul following a clash with Jonny Evans.
The clocks may have gone back in the morning but the Reds made a lightning start to catch the leaders napping. Van Persie warmed Petr Cech's hands following a neat turn after three minutes and the opening goal arrived from the next attack. Wayne Rooney exchanged passes with Young and pulled the ball back invitingly for van Persie.
Although the Dutchman's thumping drive crashed off Cech's left-hand upright, it rebounded back into the net via Luiz for a strike not dissimilar to the first goal in this fixture last term when Evans unluckily put through his own net. Attacking with real purpose, the visitors went further ahead when Rafael's fine ball down the line fed Antonio Valencia