I really don't know what I'm doing wrong, but it's starting to really aggravate me. You know how when pros serve, it almost always (at least on first serve) goes into the service box and then directly to the back fence on one bounce. It also goes pretty high up the back fence, like 4-6 feet. I also heard that this is a good indication to see if you are serving well/correctly. Does anyone know what the problem could be? Usually it takes about 1-2 additional bounces to get to the fence. Please let me know if you have any suggestions. Thanks in advance.