Ashley Cole was the most difficult opponent for Cristiano Ronaldo - they had epic battles on the pitch.
That's what that mug Martin Keown reckons anyway. He thinks Ronaldo became obsessed with trying to beat Cole when he was at Manchester United.
Ronaldo was a right winger back then and Cole was at left-back, so they were always directly up against each other. They faced off 14 times in total.
