Nine years after leaving the Red Devils, the Portuguese star could be set to return to Old Trafford as he is unhappy at Madrid's refusal to grant him pay parity with the likes of Neymar and Lionel Messi.
He allegedly has the backing of new boss Julen Lopetegui and has highlighted the four teammates he wants gone from the Bernabeu if he is to stay.
Diario Gol claim that the 33-year-old wants Gareth Bale to be transfer listed alongside Theo Hernandez, Mateo Kovacic and Isco - all go whom he apparently believes aren't good enough for Real Madrid.
Former Real boss Fabio Capello recently insisted that Ronaldo was determined to return to his former club, saying:-
I think he wants to play for United and be coached by his compatriot Mourinho.