Repairing a tennis court refers to repairing an area of a sport court with original material, such as filling a crack. Repairing doesn’t fix the problem at its root, in other words, you may need to repair it anytime because of the material. Tennis court resurfacing is a more comprehensive process where you can replace an aging tennis court with brand new materials and you won’t need any repairs at all for a few years after the resurfacing is complete.