#1 His influence at Real Madrid

When he arrived at the Bernabeu in 2009, Real Madrid were a mediocre team, struggling against rivals Barcelona for clinching silverware. However, the giant talisman proved to be the required antidote for Real's silverware woes as he lifted the club on his shoulders.
Ronaldo spearheaded Madrid's four Champions League titles in five years. Alongside making priceless contributions to the team's success, he also won four Ballons d'Or and became the first ever player to win the trophy in the Champions League era five times.
All in all, he carried out his responsibilities in a way none could have imagined in their wildest dreams. Ronaldo's striking influence and peerless contribution during Real Madrid's most successful tenure in the 21st century will definitely be impossible to replicate for the stars who join as his successors.
As for Julen Lopetegui, the new manager will find it an uphill task to match the glorious past without Ronaldo in his starting XI.