A superb second half from Portsmouth at Fratton Park has seen it hold Manchester United to a 1-1 draw in a controversial encounter that saw two red cards issued in the final 10 minutes.
Red Devil Cristiano Ronaldo was one of those sent off for an apparent headbutt on Pompey substitute Richard Hughes in a dramatic last few minutes at Fratton Park - just seconds after Portsmouth's Sulley Muntari was dismissed for a second bookable offence.
Although Ronaldo faces a three-match ban for violent conduct, Manchester United manager Sir Alex Ferguson may be even more worried that his champions are going into Sunday's Premier League derby against City still seeking its first competitive win in five games - and four points behind Chelsea.
Benjani Mwaruwari's second goal in two games - a bullet header after 52 minutes - wrecked United's hopes of victory after Sunday's disappointing home draw against Reading.
The Red Devils are, of course, also without injured England ace Wayne Rooney, whose absence allowed Carlos Tevez to make his United debut on Wednesday.
Although the Argentinian's talent looked to be slightly wasted in a lone-striker role - which even Rooney rarely plays - Tevez played a significant part in the opening goal by Paul Scholes and almost snatched a late winner.
Nani started the move through a left wing foray on his own full debut and fed the ball into Tevez - who turned and set it up perfectly for Scholes to blast in from 15 yards on the quarter-hour mark.
Pompey had an early escape when Ronaldo stayed on his feet in the penalty area when Hermann Hreidarsson clumsily clattered into the back of him following a corner.
When Nani flickered into action he tried a Ronaldo-style step-over run down the left but Pompey defender Martin Cranie made a well-timed challenge inside the area and even avoided giving away a corner as the ball rebounded off the young Portuguese before going out of play.
But Nani and Tevez were both involved in the action when United took a 15th minute lead with Scholes' powerful drive.
The goal inevitably galvanised United into more positive action after a fairly pedestrian start and Pompey were happy to see Ronaldo's shot deflected into the side-netting for a corner soon afterwards.
But, with skipper Sol Campbell absent, Portsmouth's hastily-reconstructed defence was beginning to creak against a growing pressure of attacks from the Red Devils and Ronaldo was twice close to breaking through again before the interval.
But Pompey had a lively attacker in John Utaka, whose goal almost brought them victory at Derby on Saturday, and a strong midfield presence in Muntari.
And although James had to make thrilling saves at the start of the second half to defy both Nani and Tevez, they stormed back into the game with Benjani's dramatic equaliser seven minutes after the break.
The late dismissals scarred what was a much better second half but Pompey finished celebrating another against-the-odds triumph.
They had beaten United in three of their previous four visits to Fratton Park and well deserved the point tonight.
English Premiership League
Portsmouth 1 (Mwaruwari 54)
Manchester United 1 (Scholes 15)