Got no protection from his defence in a shambolic opening 15 minutes, and was helpless to prevent any of United's goals despite a number of good saves.
Not a performance which will convince many he is capable of succeeding John Terry as the long-term leader of the Chelsea backline. Could not organise his defence as United swept forward to deadly effect early on.
Looked all at sea against Van Persie early on, making a succession of poor defensive decisions. That said, his forays forward did cause concern in the United ranks.
Gave Valencia the freedom of the right flank to drill a cross in for Van Persie to double United's early advantage. Improved later on, but the damage was done.
Left for dead by Van Persie in the build-up to United's first, and failed to pick the Dutchman up for their second. A less than stellar defensive performance from the Serb. Foolishly clipped Young's heels to get himself sent off with just under half an hour remaining, fatally undermining his side's hopes.
Led his team by example after a disastrous opening spell and, as they gained a stranglehold on midfield, his influence grew. Scored a superb free-kick to give the hosts hope just before the break, and his superb close control kept the ball alive in the build-up to Ramires' equaliser. The talisman of this new Chelsea.
Starved of possession early on, his dribbling ability and awareness became a constant menace for United as the afternoon wore on. A victim of circumstance as he was taken off with eight minutes left.
J. Obi Mikel
Looked slow and ponderous in the opening exchanges, but grew into the game and helped his team gain a foothold in midfield prior to Ivanovic's sending off.
His energy was key to Chelsea's comeback after a poor start, pressing United high up the pitch. Fought a losing battle with trademark gusto after two of his team-mates were dismissed.
Industrious as ever out of possession, on the ball he was a bundle of ideas, repeatedly troubling United with his fearless invention. set up Ramires' equaliser with a delightfully accurate cross. Unfortunate to be taken off as Chelsea looked to shore things up after Ivanovic's dismissal.
A laboured presence up front again. Very little of what he tried came off, though he did occupy Evans and Ferdinand enough to open up space for Chelsea's creators. Could have been dismissed when he was first booked and sent off with 20 minutes remaining after Mark Clattenburg judged him to have dived under a Jonny Evans challenge.
His decision to use his feet rather than his hands to repel shots was at times mystifying, but he could do nothing about either of Chelsea's goals, and he did make a couple of superb stops.
Generally assured in defence against a lacklustre Torres and was not at fault for either of Chelsea's goals.
Oscar's tendency to drift inside meant he did not have a direct opponent, but he did not offer much of an outlet for his team in attack.
A real threat going forward, his defensive positioning was occasionally shown to be suspect by Hazard and Oscar.
Looked more nervous than his more experienced partner in the face of Chelsea's fluid attack, and was lucky the referee came down on his side rather than Torres' for the Spaniard's dismissal in the second half.
Solid rather than spectacular in the midfield, and was beaten too easily by Ramires for Chelsea's equaliser.
Ran the game from midfield for the opening 20 minutes, but looked off the pace until Chelsea's second dismissal opened up room for him to operate in once again.
A display which makes it hard to see why the muscular Ecuadorian does not start more often. Defensively aware, he pinged a pinpoint cross in for Van Persie early on and gave Cole kittens all day.
His movement caused Ivanovic problems all day and eventually accounted for the Serb's dismissal.
R. van Persie
Showcased superb movement for his team's first two goals and looked dangerous whenever his team gave him the ball.
Was the key to the success of his team's gameplan early on, linking play brilliantly going forward and tracking back into midfield when his team were out of possession. Resorted to tired and cynical challenges as the game wore on, however, and was withdrawn for his own good with 15 minutes left.
Looked more assured than Ivanovic on his introduction, although United showed less full-blooded attacking intent after Hernandez had put them ahead.
Brought on as a necessity and out of position for the final 20 minutes as Chelsea made the best of a desperate situation.
Worked hard on his introduction in place of Torres and troubled United's defence against the odds on a couple of occasions.