Edwin van der Sar saved all three of Chelsea's spot-kicks as the Reds lifted the Community Shield on a sweltering day at Wembley.
The Dutch stopper showed strong arms to beat out efforts from Claudio Pizarro, Frank Lampard and Shaun Wright-Philips before Wayne Rooney tucked in United's third to seal United's 12th Community Shield after the game had ended 1-1. Rio Ferdinand and Michael Carrick also converted from 12 yards.
Sir Alex fielded a similar team to the one that took on Inter Milan at Old Trafford during midweek. The only change saw Mikael Silvestre come in for Chris Eagles, with Patrice Evra pushing forward into midfield.
The last time these sides met in the season's curtain-raiser was in 2000 when goals from Jimmy Floyd Hasselbaink and Mario Melchiot handed Chelsea a 2-0 victory. Five current United players were present in Sir Alex's team that day, including Ryan Giggs, who scored today in his 17th Wembley appearance . The match, played in blazing London sunshine, began at a decent tempo, although neither side created any chances in the opening 10 minutes.
The Blues enjoyed the lion's share of possession in the opening exchanges but found United in determined mood. Patrice Evra, Mikael Silvestre and Wayne Rooney were all penalised for using too much force in the tackle before John O'Shea got his timing just right when he nicked the ball from Joe Cole inside the area.
It took 21 minutes before United forced Chelsea stopper Petr Cech into action. Cristiano Ronaldo roared down the left wing before cutting inside with a view to shoot. He was halted by two Blues defenders but the ball squirmed across the area into Giggs' path, whose shot was bravely blocked by the Chelsea custodian.
Wayne Rooney wasted a chance from the resulting corner before Michael Carrick curled a shot