The Red Devils legend revealed that the Portugal international initially struggled with the physicality and intensity of English football.
He recalled a training ground moment when Sir Alex Ferguson reprimanded him for being too tough on Ronaldo.
Giggs said on Rio Meets: "He’s the best. I remember sprinting across in one game in the winter and I’ve took Cristiano out and the manager has gone mad. I’ve gone, ‘it’s a tackle gaffer,’ and he’s gone, ‘I know yeah but just take care. He’s a special player’.
"The first year was hard for him, but the more I think – and you’d seen it – more in training, where if he took too many touches he’s getting kicked. The gaffer wasn’t giving fouls."
