Playing tennis on your own can be a challenge. You are going to need someone to return your balls for a good practice. The T-APEX Tenniix can help. It is an AI vision tennis robot with over 1000 drills. It features vision and UWB hybrid tracking. It combines with your phone to help you analyze ball landing points.
Here are the specs:
This robot has a modular design. You can use the Voice armband for hands-free control. The battery life lasts over 4 hours. Its battery is hot swappable in seconds. You can find this project on Kickstarter.