Cristiano Ronaldo rejected the chance of rejoining Manchester United due to Sir Alex Ferguson's retirement at the end of last season, according to The Sun.
The Sun suggested back in December 2012 that Manchester United were plotting a sensational move to re-sign the 28-year-old forward in the summer.
Ronaldo was also said to be keen on moving back 'home' after realising his dream of playing for Real Madrid.
However Manchester United's move for Ronaldo broke down following Ferguson's departure from Old Trafford.
Mourinho's return to the Premier League also meant Ronaldo's desire to leave the Santiago Bernabeu was not as intense as it was under the Chelsea boss.
Real Madrid's offer of a staggering £35million a season five-year deal also tempted Ronaldo into rejecting overtures from Manchester United.
Florentino Perez was another major reason why Ronaldo wanted to leave the La Liga giants, as the Real Madrid president failed to back his star player at last season's UEFA Best Player in Europe awards ceremony.
Perez reportedly told Ronaldo: “You can leave as long as you bring enough money to sign Lionel Messi.”
However Perez and Ronaldo eventually came to an agreement over a five-year deal which shattered Manchester United's hopes of signing their former superstar.