Ronaldo has proven his class today. Maybe not the youngest anymore, but he has a lot of experience and also a lot of talent,
No one will say Ronaldo is young, dude. He is an old man, 37 years old already. 
But Ronaldo has no problem with his age, as we all know he can prove it today. With his talent and experience, Ronaldo could make another hat-trick (3 goals) in his career. This hat-trick was special because he made it on a strong team like Tottenham. Although Manchester United isn't in a good shape, Ronaldo can help to get 3 points today. It simply shows how good his mentality and skills in football are, he is truly one of the best strikers in football history.