Al Nassr forward, Cristiano Ronaldo, has hinted that he could end up playing alongside Lionel Messi before their careers are over.. Ronaldo’s future with the Saudi Pro League team is uncertain, with his current contract set to expire June 30.. The 40-year-old could leave Al Nassr and one of his options could be the Major Soccer League, MLS, in the United States.. Ahead of Portugal’s Nations League final clash with Spain, Ronaldo told reporters: “You know I have a lot of affection for Argentina, my wife is from there.. “I have already been invited to play in the Club World Cup for an Argentine club. You never know… the time is there.. “I am already 40 years old, but you never know. But I think it is very difficult. I have never been to Argentina, I want to go, I have a lot of affection for the Argentines.”