The forward’s son, Cristiano Ronaldo Jr was playing in a U-8 game and he was there to watch.

The Portugal international did not only watch, he was an emergency ball-boy as he can be seen going to retrieve a loosed ball from the back of a post.

Ronaldo and his son are regularly seen training together in Instagram videos shared by the three-time Ballon d’Or winner.

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Even though young Cristiano is just five years old, Ronaldo has said he wants his son to be a football player.

"I want my son to be a player. I am a footballer and I want him to be one too," Ronaldo told the Chinese , which is making a reality TV show about the Portugal star.

"I think he has something of an athlete about him, he has athletic characteristics. Obviously, he is very young, a baby, he's only five, but he loves football. That is a big plus.

"I have 30 balls at home, he is always with the ball and he loves it. But I will not force him to be a player because it comes naturally, it has to be his choice

"He will be whatever he wants to be, I am not going to push him at all. But obviously, I want Cristiano to be a player. A top one, like his dad."

Ronaldo will next be in action for Portugal when they play 2018 FIFA World Cup qualifiers at home to Andorra and away to the Faroe Islands.