Clay courts are considered "slow" because the balls bounce relatively high and lose much of their initial speed when contacting the surface, making it more difficult for a player to deliver an unreturnable shot. Points are usually longer as there are fewer winners. Therefore, clay courts heavily favor baseliners who are consistent and have a strong defensive game, which has allowed players such as Rafael Nadal, Björn Borg, Chris Evert, and Justine Henin to find success at the French Open. Players who excel on clay courts but struggle to replicate the same form on fast courts are known as clay-court specialists. Clay-court players generally play in a semicircle about behind the baseline. Clay courts favor the "full western grip" for more topspin. Clay court players use topspins to throw off their opponents.