Rumours are rising of a next possible destination for Ronaldo as his contract at Al-Nassr expires in June.
The two Portuguese men first joined forces at Real Madrid in 2010 after Mourinho's Champions League win with Inter Milan.
Within three seasons together Ronaldo netted 168 goals as they claimed a Spanish title and Copa del Rey.
In 2013 he returned to Chelsea where he won his third Premier League title.
Ronaldo remained loyal to Madrid until 2018 when he joined Juventus, then Manchester United and finally Saudi Pro League club Al Nassr.
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The 39-year-old is yet to pen an extension, leading to rumours he could link up with Mourinho once again.
During a press conference the 'Special One' put the rumours of Ronaldo joining his club, Fenerbahce, to rest.
He said: "Cristiano Ronaldo will not come. The first reason is that I have three good forwards and I don't want another one.
"Cristiano will always be Cristiano, but I don't want him because I'm happy with my forwards. He has the money he earns in Saudi Arabia and a goal of 1,000 goals. What could motivate him to come to Turkey, other than the beauty of Istanbul?
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"I never say no to a transfer, but I don't knock on Ali Bey's or Acun Bey's door and say I want a transfer."
Mourinho's strikers, Edin Dzeko who has netted eight in the league, Cenk Tosun and Youssef En-Nesyri currently have 15 goals between them in all competitions this season. Ronaldo alone has 16.
The manager is yet to bag silverware at Fenerbahce but his side are in good stead, currently sitting second in the Super Lig.
Ronaldo has also been linked to a move to rival club Al Hilal which their CEO Esteve Calzada dubbed as 'science fiction'.
A transfer could occur at an opportune moment for the club and Saudi league. Right before the June Club World Cup.
It's move which could see Inter Miami's Lionel Messi share the pitch with Ronaldo as they did for many iconic years in Spain for Barcelona and Real Madrid.
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The forward would also face his former side if he were to jump to the other side of Riyadh as Al Hilal were drawn into Group H with Real Madrid, RB Salzburg and Pachuca.
The Club World Cup gives the Saudi Pro League another opportunity to globalise their product as they aim to develop from a retirement home for stars to a group of world class teams.