Cristiano Ronaldo has the mental age of a 12-year-old, according to former Manchester United teammate Mads Timm, though he believes the Real Madrid star benefits from his selfishness.
Timm spent six years at Old Trafford from 2000, but made just one first-team appearance, coming on against Maccabi Haifa in the Champions League and had loan spells at Viking, Lyn and Walsall before his departure.
The Dane may not have had a prosperous spell at United, but he remembers sharing a dressing room with Ronaldo and pointed out the Portugual international's self-centered mentality.
"He's completely indifferent to the collective side of the game," Timm wrote in his biography Red Devil.