Speaking in the aftermath of the Nations League, Martinez said: "At 40, he has unique experience in the world of club football," Martinez said of Ronaldo.
"Being a coach isn't about picking or not picking Cristiano Ronaldo, it's about using the best players to have the best team and win titles. It's important to make decisions based on facts, and Cristiano has scored 20 goals [for Portugal] in [the last] 25 games. There are no records like this.
"We've managed to make the dressing room a very competitive place, and when you have a player like Ronaldo, it's a football lesson every day."