The ex-Real and Tottenham playmaker told talkSPORT's The LineUp: "He never left his house! I always say as a joke, Ronaldo is the only player that I never saw his willy! He was the first one on the training [pitch]! And the last one who went. First of all his body, wow! A machine. He was a little bit ahead of his time, players now are the same. But his training in the gym, food, sleep. For him that was more important than training extra hard."
Van der Vaart also spoke about Ronaldo's selfish mindset. He said: "Ronaldo was so unbelievably selfish, if we won 6-0 and he did not score, he was not happy. When we lose but he scored twice, it'd be alright!"
However, the Dutchman insisted Ronaldo's behaviour was not a problem, adding: "No, no! It was just that he needs to score. It was the same with Ruud van Nistelrooy, I had so many chats with him and it was so interesting because he was always like 'I need my goals! I need my goals!'"