Datacipher
Banned
Depends on the fence. There is one court at one club in my area where I can routinely hit serves through the fence. Everywhere else the fence holds the ball in.
I find on a standard fence, once I start going over 100mph....maybe one in 30 go through....of course...sometimes you do 3 in a row, then nothing happens for 50 serves.....it's random as expected.
If you get those fences with bigger gaps then they start going through much more....I think the fences with plastic coating also let the ball through much more.