I feel like it wasn't really underestimating, no team that beats Liverpool 3-0 would be underestimated, plus they are at the finals for a reason, they beat all their opponents till there, which means that they are good enough to be on the finals so they are not to be underestimated. Like I said, its purely about aggression, playing full field aggressive pressing offense means that unless you find a way to put the ball ahead, they are going to attack you. Italians have a mean mean defense, and they know it works. Look at how great they have been in the last two years at European competitions, the Italian style of football is making a big comeback.