I always remember an interview in some kind of kids football magazine, Shoot or Match or suchlike (I was a kid at the time), asking Alan Hansen who his most difficult opponent was. Alan responded something along the lines of "I've played against Maradona, probably the best player to ever play the game, but without doubt the most difficult opponent was Billy Whitehurst."
Even as a young kid of less than 10 this made me grin ear to ear.