I remember Agassi playing Federer in Basel, Switzerland in 1998, and Andre was already saying at that time that Federer would be tough. Usually at the time players are 17, you can see if they will be great.
“I leave to others the decision as to the good or evil tendencies of my character, but such as it is it shines upon my countenance, and there it can easily be detected by any physiognomist.”