Rooney acknowledges that the outcome of the game could have been very different had Hart not saved Ronaldinho's penalty early in the first half when Jack Wilshere was harshly adjudged to have handled the former Barcelona man's shot.
"It was great for him to save a penalty, especially against one of the best of all time," Rooney said.
"It was a great moment for Joe. If that had gone in it might have been a different game.
"I am sure that they would have tried to keep the ball and tried to frustrate us but thankfully we got the first goal."