Javier Hernandez grabbed a 3-2 victory for Manchester United over Premier League leaders Chelsea after the previously unbeaten hosts had been reduced to nine men in a tempestuous clash at Stamford Bridge on Sunday.
The Mexican, looking suspiciously offside, tapped in the winner in the 75th minute to kill off a vibrant Chelsea side who had battled back from 2-0 down before having Branislav Ivanovic and Fernando Torres sent off by referee Mark Clattenburg.
A David Luiz own goal gave United the lead after four minutes and Robin van Persie fired the visitors 2-0 ahead eight minutes later.
Juan Mata began the Chelsea fightback with a curling free kick in the 44th minute and Ramires hauled Chelsea level shortly after the break with a header.
However, Chelsea's momentum was halted when Ivanovic was red-carded for tripping Ashley Young and worse followed when Fernando Torres appeared to have been felled by Jonny Evans but was instead shown a second yellow card for diving.
The home crowd roared its disapproval and then watched on as Hernandez, on as a substitute for Tom Cleverley, poked home United's winner from close range.
Alex Ferguson later admitted that Jonny Evans probably caught Torres, but he said that the Spaniard only has himself to blame for the red card: "The decision the referee has to make is whether the striker has chosen to go down. He was through on goal- I don't know why he has gone down. I think it's his own fault. It's been ten years since we have won here (at Stamford Bridge). We had a good record until Jose Mourinho came along and spoiled the party. We have never got breaks here and had some terrible decisions against us in the last few years, but today we have got a little break for the goal. Chicharito may have been offside."
Earlier, Uruguayan striker Luis Suarez courted more controversy as he inspired Liverpool into a two-goal lead against Everton in a thrilling Merseyside derby that ended 2-2 at Goodison Park.
Suarez's low cross was turned into his own net by Leighton Baines after 14 minutes and he then doubled his side's lead five minutes later with a glancing header.
Everton battled back to earn a draw with goals from Leon Osman and Steven Naismith before halftime but it was Suarez who guaranteed he would be making the headlines.
Heavily criticised before the match by Everton manager David Moyes for his perceived habit of diving, he celebrated Liverpool's first goal by racing over to the Everton dugout and throwing himself theatrically to the ground.
Moyes was clearly not amused although he later made light of the incident, appearing more angry with Suarez treading on the leg of Everton defender Sylvain Distin in the second half, for which Suarez received a yellow card.
"I thought it was great, I would probably have done the same, but he is going to have to dive in front of a lot of managers now," Moyes said of the Suarez theatrics.
"He was a very lucky man to stay on the park because of his tackle."
Liverpool had looked to be cruising to victory in the 219th Merseyside derby when they went 2-0 up with only 21 minutes on the clock.
Suarez, central to most of the game's incidents, pounced in the 14th minute to fire in a low shot that deflected off the legs of England defender Baines.
Liverpool were 2-0 up five minutes later when Steven Gerrard's inviting free kick was met by Suarez whose header was beyond the reach of Everton keeper Tim Howard.
The visiting celebrations were cut short, however, as a minute later Liverpool failed to clear a corner properly and Osman thumped home a shot past keeper Brad Jones.
Everton suddenly came alive and they were level shortly after the half hour mark when Marouane Fellaini crossed for Naismith to stab home the equaliser.
The hosts went for the three points after the break and had the better chances although Suarez thought he had sealed it for Liverpool in the final minute of stoppage time but his effort was ruled out by the linesman.