Sand, grass, turf, carpet and concrete have long been among the different tennis court surfaces around the world. Tennis court surfaces differ significantly depending on the surface, affecting ball bounce, speed, damping and slipping, among others. Tradition and climate can influence surface selection; while sand courts, natural grass and synthetic turf are the preferred playing fields in Europe, acrylic sports covering systems are well established in North America and Australia. In April 2020 Sport Group was awarded a five-year contract to equip the US Open tennis courts with Laykold Acrylic tennis surface systems.