There as been a lot of discussion on here about depth vs angles, along with many aspects on this topic. We all know that Depth Control is a huge Key to great tennis, but how deep? The discussions have been difficult due to various definitions each individual seems to hold on their idea of great depth (extreme depth), so for this thread, we will reference the definition found in a couple instructional books ....."the back 3 ft of the court" to the baseline, as well as often seen in instruction and diagrams. Hi Tech Tennis recommends to hit at least within 5ft of the baseline. But more than 5ft away from the BL, then you will be in the group that agrees that Moderate depth can be useful and even more desirable when it comes to what is optimal for rally shots and mid ct ball attack attempts for this discussion. Now please understand, I'm not agreeing with the idea of "Extreme depth" defined above, but just providing a definition for a frame of reference on how this has been taught thru the years. I think even most Touring Pros miss too much when going for the great or extreme depth within 4-5 feet of the BL But many rec players are shooting for the back foot of the court! I'm in the camp that believes in hitting "well short of the BL" or for a more moderate depth. The idea is that shots will land in or near the triangles of course, but more to the point, the deep cone marks your target line from where your shot is contacted, as well as the max depth we will hit for. We will often hit slightly deeper than the deep cone due to catching the ball strong and aggressive, but that is the purpose of the margins of error built into the triangle. The 2 short cones mark an area that we generally seek to pass....and form a gate if you will, to hit into the triangle or slightly beyond, and are on the shorter side of things to account for times when we are in position to go for sharper angles. As a general idea, we should hit more for the deep cone when looking to work the court more vertically as we do with RALLY Shots, and hit closer to the shorter cone section of the triangle when looking to work our shots for more width as we do with mid court attack shots.