Sir Alex Ferguson saluted the United faithful for roaring the Reds to Moscow.
United's 12th consecutive home win in the Champions League was aided by the so-called 12th man - the Old Trafford crowd.
The scarve-wearing, flag-waving fans were vociferous from the first whistle to the last - give or take some tense moments when Barca threatened to score the feared away goal.
"The fans were absolutely brilliant," said Sir Alex on MUTV. "When our crowd gets like that, we never let them down. They make such an impact, they force us to play."
The United players responded with some tremendous performances, and one in particular caught the manager's eye.
"That was a great performance, we had so many good players, it’s a shame to pick out just one. Wes Brown, Rio Ferdinand… you could go right across the back four. But Tevez to me was absolutely fantastic. Tevez at times was an absolute terrier."
Arguably the only thing Tevez's performance lacked was a goal. The same has been said of Paul Scholes several times this season but he picked the perfect moment to end a barren spell dating back to last August.
"He scored in the second game of the season at Portsmouth and then today he’s come up with another one!" remarked Sir Alex.
"We’ve seen so many great goals from Paul in the past but tonight, considering the occasion and the importance of the game, he scored an absolutely magnificent goal."
The comfort of a second goal never came, so it was an anxious evening all round for fans, players and even the most seasoned of club staff.
"I just hope my pacemaker’s working! If not, I’m in trouble!" quipped the boss.
"It was excruciating, that’s what it was. The pain and the agony - I always feel that to get success, the players have to endure that. All the hard work, all the pain and torment you go