Chelsea and Manchester United launched the English season in explosive fashion as the Blues' 4-1 penalty shoot-out win in yesterday's Community Shield was marred by an ugly clash between Michael Ballack and Patrice Evra.
With United keen to prove a point to the critics questioning their ability to cope without Cristiano Ronaldo and Carlos Tevez and Chelsea trying to impress new boss Carlo Ancelotti, there was a definite edge to a match that finished 2-2 after 90 minutes.
The bubbling tension boiled over in the second half when United defender Evra fell to the Wembley turf in pain after a body-check from Chelsea substitute Ballack.
Referee Chris Foy waved play on but United's players wanted Chelsea to kick the ball out so Evra could get treatment.
Chelsea refused and Frank Lampard took advantage to score, much to the frustration of Evra who became involved in a row with Ashley Cole and then scythed down Ballack to earn a booking.
Alex Ferguson's team had taken an early lead when Nani drove home from the edge of the area.
Ricardo Carvalho equalised after half-time before Lampard's controversial strike, but Wayne Rooney levelled for United in stoppage time.
For Ancelotti the feisty encounter was an ideal introduction to the no-holds-barred nature of English football, while United could take heart from a determined display that showed they won't give up their three-year reign as champions without a fight.
After a disappointing start to his career at Old Trafford, Nani has the chance to make amends this year. Ronaldo's departure has opened up a berth for the Portuguese winger on the left and he gave a glimpse of his potential with a fine strike to put United ahead in the 10th minute.
Collecting Darren Fletcher's long pass, Nani shifted away from Bransilav Ivanovic and Michael Essien before firing in a powerful drive that flashed past unsighted keeper Petr Cech into the far corner.
If Cech could have done better with that one, there was no questioning his agility when he plunged to his left to claw away Park Ji-Sung's shot and then kept out Dimitar Berbatov's flicked effort.
Just as he did at Milan, Ancelotti used a midfield diamond formation that saw Lampard deployed just behind Didier Drogba and Nicolas Anelka, while John Obi Mikel shielded the back four.
But the system may need some work judging by the way United were able to find holes in Chelsea's defence in the first half.
United goalkeeper Ben Foster had a chance to underline his England credentials but he looked nervous at times and twice dallied dangerously over back-passes when a quick clearance was needed.
Fletcher's curling effort forced a brilliant tip-over from Cech before half-time, but it took Chelsea just seven minutes of the second half to equalise.
When Florent Malouda lobbed a cross towards Drogba, the Ivory Coast striker collided with Foster, giving Carvalho time and space to direct a diving header into the empty net.
Lampard's controversial strike arrived in the 70th minute.
Ballack clearly blocked off Evra but the referee didn't give the foul and Chelsea broke through Drogba, whose pass allowed Lampard to drive home.
That wasn't the end of the drama. With just a minute of stoppage time to go, Rooney ran onto a Ryan Giggs pass, held off Jose Bosingwa and planted a low shot past Cech to send the match to penalties.
Cech saved from Giggs in the shoot-out and then easily kept out Evra's weak effort before Salomon Kalou slammed home the winner.