The 36-year-old has forced a return to the Premier League from Juventus as one last shot at a sixth Ballon d'Or and Champions League title. Ronaldo arrived at United as a skinny 18-year-old from Sporting Lisbon in 2003 with a bag of tricks. In six years under the tutelage of Alex Ferguson his physique and end product were transformed to lead United to three Premier League titles and Ferguson's final Champions League in 2008. After ending Real's long-wait for "La Decima", the club's 10th European Cup, he spearheaded a run of three consecutive Champions League wins between 2016 and 2018. However, United' season and Solskjaer's time in charge will now likely come down to whether Ronaldo fires or fails second time around at Old Trafford.