It's true that agassi and federer use the same, semi-western grip. Is this accurate? When i watch these two players play, it seems as if federer uses a more extreme grip than agassi, which is probably why federer can generate so much top spin. Agassi generates top spin, but its not the super loopy type that federer has. Does agassi use a less extreme grip than federer? Also, correct me if i'm wrong, but a semi-western grip is when the base knuckle is on the 4th panel ??