For whatever type of tennis court you have, we recommend these maintenance tips: Grass: Mowing, watering, soil testing, compacting, and painting. Grass needs almost daily care. Acrylic over concrete or asphalt: Cleaning and covering regularly. Repair cracks as needed. Clay: Watering (to keep the clay from cracking), spreading, compacting, and painting.  Regularly clear out drainage outlets. Remove mold, fungus, and weeds immediately. Use proper equipment—carefully use a power washer and limit the pressure on water brooms.