| "Mastering the Dirt - Playing on Clay" is just the DVD you need to take your clay court game to the next level. Clay courts slow the ball down, producing longer rallies and making players adjust their strategies. USPTA professional Lorenzo Beltrame, director of tennis at the Human Performance Institute in Orlando, Florida is your clay court instructor for this DVD. Throughout his career he has worked with dozens of world-class players, including former world No. 1 and hall-of-famer Jim Courier. Playing and sliding on clay can be a lot of fun, so you're sure to enjoy this one.