Manchester United manager Sir Alex Ferguson has warned Cristiano Ronaldo that moving to Real Madrid would be the "worst thing" for his career.
Ferguson, who met the injured winger in Lisbon last week, said a switch from Old Trafford would be a big mistake.
He said: "If you were asked for advice by your son, you would give him the best advice and the worst thing Ronaldo could do is to go to Real Madrid. "He is at the right club and a fantastic football club."
Ronaldo, who scored 42 goals for United last season and whose contract runs until 2012, refused to rule out a move to the Spanish champions over the weekend.
The 23-year-old is currently recuperating after ankle surgery, which ruled him out of United's trip to South Africa.
But Ferguson, who was speaking in Durban ahead of United's pre-season friendly clash with Orlando Pirates on Tuesday, has reiterated his belief that Ronaldo will be staying at Old Trafford.
"In the modern day, young lads can be twisted by the talk of money, but if you saw Ronaldo after the Champions League final, he was the happiest boy in the world," he said.
"I genuinely believe that I know what the best club in the world is for him and that is Manchester United.
"When you have young players, you want the best for them and you want to do the best for them."
