how to maintain a grass tennis court
1 To maintain your grass tennis court, steamroll the grass tennis court once a week. 2  You can purchase or rent a steamroller at any hardware store. 3  In order to maintain a grass tennis court you will need water. 4  Make sure to water your grass tennis court every single day for good maintenance.f will also require a bit of time and dedication to keep the grass tennis court up to playing standards. 1  Mowing a grass tennis court is very important for maintenance. 2  Any grass mower will do the trick. 3  If you have just one tennis court a lawn mower would suffice.