The Red Devils want their former No.7, who is said to be desperate to quit Real Madrid, back.
And United are ready to use the superstar’s wish to push a deal for him and striker Alvaro Morata, while also sending goalkeeper David de Gea to the Bernabeu.
A United return would mean a reunion with the fans who adored him at Old Trafford after spending five seasons with the club between 2003 and 2009.
During that time, CR7 won the Premier League five times, the Champions League in 2008 and also picked up the first of his four Ballon d’Ors.
Madrid had initially slapped a huge £350m price tag on Ronaldo in a bid to ward off interest from those clubs in a financial position to afford him, namely United and French giants Paris St-Germain.
But the 12-times Champions League winners are known admirers of United goalkeeper De Gea and have courted the Spaniard for the past few transfer windows.
United are also interested in bringing 24-year-old Morata to English shores, and look prepared to part with De Gea in order to pull off the enormous transfer coup.