Depending on the type of future surfaces for the tennis court, the subbase are laid accordingly. The constructions (constructional nodes) of acrylic, synthetic grass and clay courts are different. When the subbase are set, it is important to have the inclines formed in this stage. In order to keep the construction stable, suitable inert substances have to be used, while the works have to be carried out in compliance with STR (building technical regulation) and KTR (road technical regulation) standards.