Where the hell you been, jay?
Heh, like Djoker said, I've been working on the game.
Sounds like you missed me.
FWIW, a 100 MPH serve is NOT that damn fast. The men only serve about 85-100 on second serves, and the first serves rarely drop below 120 (at the Davis Cup they averaged close to 130). IMO serves look faster on TV than they do in real life (I watched the same match live and then on TV).
I think the general rule of thumb is that if you can hit the fence without bouncing on a flat serve, it's 100+.
So sure, those serves might be 100 or more. But that isn't saying much. And it means nothing if you don't have a complete game.
No offense, Nanshiki, but unless you're a pro player, you've made some pretty groundless statements.
I've never watched a pro match before, but I've witnessed some mind-blowing rallies between retired pro players and nationally-ranked junior players. To the casual observer, tennis player or not, these balls are travelling at a phenomenal pace. Now consider that current pro players, both men and women, hit at least as hard or harder than that (and on a more consistent basis) and their groundstrokes are usually in the 50-70 mph range during rally balls, give or take.
There's no way the ball looks faster on TV than it does in real life. Pros make it look easy and generally people get the sense that it's an easy sport until they actually experience it first hand and discover that the ball is going a LOT faster than what they perceived on TV (I remember even Federer saying he couldn't believe how hard other pros hit the ball when he actually watched a pro match from the stands.)
As for your back fence theory, even I can hit a 60 mph kick serve that hits the back fence. Hell, if done correctly, I bet someone could do an underhand serve that bounces OVER the fence.