Madrid retain club world cup ronaldo winner
I think there may be some confusion here!
Real Madrid did indeed win the FIFA Club World Cup in 2014, 2016, 2017, and 2018. However, Cristiano Ronaldo was not the winner of the Club World Cup in any of those years.
In fact, Cristiano Ronaldo left Real Madrid in 2018 to join Juventus FC. He won the Club World Cup with Real Madrid in 2014, 2016, and 2017, but not in 2018.
If you're thinking of a specific match or tournament, please let me know and I'll do my best to help clarify!