The pair formed a potent partnership during their time at Old Trafford .
While Ronaldo moved on to Real Madrid to go toe - to - toe with Lionel Messi to be the best player in the world , Rooney stuck with Man United .
The pair formed a potent partnership during their time at Old Trafford and while Ronaldo moved on to Real Madrid to go toe - to - toe with Lionel Messi to be the best player in the world , Rooney stuck with Man United .