An Old Trafford return would cost at least â‚¬75million and reunite Ronaldo with Wayne Rooney, who Alex Ferguson has vowed will be a United player next season.
And speaking at the Laureus Sports Awards in Rio last night, United director Charlton admitted: â€śAny great player would be welcomed back but Cristiano went beyond being just a great player.
â€śHe scores phenomenal goals, loves the club and was just the right sort of player at Manchester United. Iâ€™m a fan of him like anyone else and on a personal level I would like to see him back. I canâ€™t say anything more than that.â€ť
Has Sir Bobby dropped a big hint? Still a director, could he be confirming a bid is being prepared? Give us your shout below...