United head to the Allianz Arena for Tuesday's quarter-final first leg, with Ferguson pinpointing Ribery and former Chelsea winger Robben as Bayern's danger men.
"Robben and Ribery are the ones who have been carrying the banner for Bayern," Ferguson told The People.
"They have been behind in games so many times and one of those two has always rescued them, so they are obviously the players to watch.
"Robben is talented and we know what he can do. He plays wide right and cuts in on to his left for his shots and he has a tremendous left-foot shot, but I think we will be all right coping with him.
"I think we have the full-backs to cope with them. In this situation you hope they perform well.
"It's one thing coping with the wingers' threat, but it's what Robben and Ribery do when we get the ball, and that will be the key for us."