GreenSet is a brand of acrylic hardcourt surface used in many professional tennis events run by the International Tennis Federation (ITF) and on the ATP and WTA tours. It is made of layers of acrylic resin and silica on top of an asphalt or concrete base, for permanent facilities, or on top of a wooden platform, for venues with occasional use. The company is based in Barcelona, Spain. GreenSet surfaces are homologated by the ITF Court Pace Rating categories, classified in the Medium-Slow, Medium and Medium-Fast. The surface is currently in use at the following tournaments: