from your signature it doesnt look like you are 3-0 any more dude
no seriously tennis is AWESOME and you can make good dough on it
but it takes time to acquire knowledge and experience, you have to follow consistently in order to be aware of player form and other factors, that way you can choose the great pics and avoid the traps
it helps if you like tennis too, if its interesting for you to follow it then it becomes ridiculously easy to predict