If you are ready to make a big investment in tennis ball machines I recommend the SpinShot Player edition. It’s got great features and is all I use.
https://spinshotsports.com/products/spinshot-player-tennis-ball-machine?sca_ref=4144996.tjVNPSJxgN
For tennis balls I recommend these ones, they don’t need to be prefect and these ones turned out to be worth the price.
For tennis balls I recommend these ones, they don’t need to be prefect and these ones turned out to be worth the price.