David is the third best player on clay after Rafa Naldal and Roger Federrer at the moment. He's an excellent returner and his movement on the court is one of the best in the tour. He faces a slow player like Malisse and he will exploit this weakness. H2H is very old and really no clay matches to tell something about. Ferrer already dispatched Guez and Malisse will be an easy target for him.