"I'm 100% sure I won't return to any European club.
Ronaldo's long-time rival Messi was also linked with a move to Saudi Arabia before the Argentine World Cup winner completed a transfer to MLS side Inter Miami, signing a deal until 2025.
"The Saudi league is better than MLS," Ronaldo said.
Several high-profile players have followed Ronaldo to the Saudi league, including Ballon d'Or winner Karim Benzema from Real Madrid and N'Golo Kante from Chelsea, who both joined champions Al-Ittihad.
($1 = 0.8892 euros)Reporting by Rohith Nair in Bengaluru; Peter RutherfordOur Standards: The Thomson Reuters Trust Principles.
Persons:
Cristiano Ronaldo, Lionel Messi, Ronaldo, Al Nassr, Al Nassr's, Messi, Ballon, Karim Benzema, N'Golo Kante, Rohith Nair, Peter Rutherford
Organizations:
Saudi, Major League Soccer, Manchester United, Celta Vigo, ESPN, Premier League, Argentine, MLS, Inter Miami, Real Madrid, Al, Thomson
Locations:
Europe, Portugal, Saudi Arabia, Real, Chelsea, Ittihad, Bengaluru