The act of intimidation is to cause a person with otherwise "normal" sensitivities to crap their pants and be thrown off their stride. While this may have a greater effect in the NFL, Rugby League or ice hockey due to the physical nature of those sports, it is nonetheless a factor in soccer.
Messi intimidating?
Id guarantee you most defenders are intimidated by messi for completely different reasons to players like keane of course. but you would have to be stupid not to be lol...
Ronaldo and Messi can make defenders look like kids that's why they are two best players at this moment