Rooney enjoyed a fruitful spell alongside Ronaldo at Old Trafford before the latter made his big-money move to Madrid, where he has since notched up 274 goals in 262 matches for Los Blancos.
And despite Messi over-taking his rival and equalling Raul’s record as the top goal-scorer in European competition, Rooney firmly believes Ronaldo is the better player.
When asked by MUTV whether or not Ronaldo is likely to retain his Fifa Ballon d’Or award he won earlier this year, Rooney replied, "I think so. I'm sure it'll be difficult to give it to anyone else."
"He's had an incredible two or three years and I think he has certainly overtaken Lionel Messi now as the best player in the world."
Rooney’s new team mate Angel di Maria is the only Manchester United player represented in the 23-man shortlist for the 2014 Fifa ballon d’Or, with the winner set to be announced in January next year.