Ferguson told United's official club website: "It was an important goal, don't get me wrong, and who's to say what would have happened without it, but I don't think it saved my job.
"You never know in football. Who's to say how the club would have reacted if we'd lost and if crowds had tumbled? Although it was unusual for United crowds to do that.
"One thing's for sure though - Bobby Charlton would not have let it (my sacking) happen. He knows better than anyone the heartbeat of this football club. This football club needed the foundation of youth and we were doing some great work there. Bobby knew we were on the right road."
Ferguson, full of admiration for Robins' work as manager of Rotherham and now Barnsley, added: "He did a great job at Rotherham. They were going into administration and it's not easy if that happens because you can't get any players."