Ever since, however, speculation has been rife he would one day make a dramatic return.
United's is said to be the only offer that motivates Ronaldo, whose relationship with Real chiefs is at breaking point.
However, Diario Gol add that what he does next hinges on the appointment of a new Madrid boss.
Zinedine Zidane quit last week, citing fatigue, in a decision that supposedly left Ronaldo feeling crushed.
The report indicates that if an authoritative figure comes in, Ronaldo is ready to push for a United return.
Cristiano Ronaldo: Real Madrid star is eager to join Manchester United (Image: GETTY)
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Ronaldo transfer will be 'difficult to make happen' says Sid Lowe
Jurgen Klopp and Max Allegri, of Liverpool and Juventus respectively, supposedly fall into that category.
But Tottenham’s Mauricio Pochettino and former Swansea manager Michael Laudrup do not.
Former Real boss Fabio Capello last week expressed a belief that Ronaldo wanted a United return.
"I think that Cristiano Ronaldo wants to go back to Manchester,” he said.
“I think he wants to play for United and be coached by his compatriot Mourinho.”