Lets see Fed do this:
I think I saw him try it vs. Haas one match and it wasn't nearly close to the hops Sampras got
Fed has more endurance.. But thats mainly because Sampras had a blood disorder which zapped a lot of his endurance away.
Sampras could also dunk a basketball on the standard 10 foot rim. . I highly doubt Roger can
Athleticism- Pete by a country mile