Cristiano Ronaldo has not ruled out playing alongside long-time rival Lionel Messi before the end of his career, but has admitted it would be very difficult to do so, with time running out. The former Real Madrid and Manchester United superstar is set to see his contract with Al Nassr expire at the end of the month.

Both Ronaldo, 40, and Messi, 37, are likely in the twilight years of their careers with the former playing in the Saudi Pro League and the latter in Major League Soccer with Inter Miami. Nevertheless Ronaldo finished as top goalscorer in his division, while Messi has 10 goals in his 12 starts this season.

Seeing the GOAT contenders playing in the same colours appears unlikely even with Ronaldo possibly eyeing a fresh move however. Although, the ex-Juventus sharpshooter did find some interest from Argentina ahead of the Club World Cup in the United States.

It is clear Ronaldo has respect for the nation and his adversary however. Asked about the prospect, Ronaldo provided a thoughtful answer.

"You know I have a lot of affection for Argentina, my wife is from there," Ronaldo replied. "I have already been invited to play in the Club World Cup for an Argentine club.