Messi vs. Ronaldo could be a Club World Cup dream, although it could turn into a nightmare scenario if not done correctly.

Cristiano Ronaldo's chapter at Al-Nassr could be over if you are to believe his social media post, but the Portuguese legend doesn't seem to be headed for retirement at 40. At the end of the Saudi Pro League season,

Former Manchester United and Real Madrid star Cristiano Ronaldo is widely regarded as one of the greatest – if not the greatest – players in the history of football. The Portuguese forward has been at the top of the game for two decades, and his impressive resume truly speaks for itself.