Due in part to advances in racquet technology, current clay-court specialists are known for employing long, winding groundstrokes that generate heavy topspin, strokes which are less effective when the surface is faster and the balls do not bounce as high. Clay-court specialists tend to slide more effectively on clay than other players. Many of them are also very adept at hitting the drop shot, which can be effective because rallies on clay courts often leave players pushed far beyond the baseline. Additionally, the slow, long rallies require a great degree of mental focus and physical stamina from the players.