It’ll take 3 to 7 days to resurface a tennis court. Although, if your tennis court has severe cracks, an improper slope, or drainage issues, you can expect resurfacing to take a week or more. The resurfacing process includes the following: Removing the old surface and inspecting the base for cracking, shifting, or drainage issues Thoroughly cleaning moss, fungus, and debris  Repairing the court—cracks, leveling, low spots, peeling Fully resurfacing with acrylic coatings