I have this interesting observation that clay courters like Nadal, Coria and Gaudio (to name a few) often hit off their backfoot. The pace of the modern pro game (albeit with clay being the slowest surface) combined with the slippery clay surface seems to always force one to hit off balance shots i.e. off the back foot and fall back afterwards. A good example is Nadal, who uitilizes his backfoot reverse forehand to its maximum potential. If you hit off the backfoot, it puts more pressure on you body, and does not allow you to drive through the ball as much. However, it allows you to recover quicker and generate spin from off balance positions, both of which are very important in clay court tennis. Is my observation correct? Or is hitting off the backfoot jsut a byproduct of bad technique and late timing?