Ronaldo revealed the most difficult opponent in his career

Cristiano Ronaldo has revealed  the most difficult opponent which he has faced so far in their careers.

The pair have met several times during his six years with United.

Ashley Cole is the man who gave Ronaldo difficult period.

“Over recent years, I’ve had some good duels with Ashley Cole, who has not given me a second to breathe.”

“He was so good player at the peak of his career, it was very hard against him. I always knew matches against him will not be easy “, said Ronaldo.