The world’s first AI-powered tennis robot that actually rallies with you. Here’s a look at what it does, how it works, and who it’s for.
What is the Acemate Tennis Robot?
Acemate is a mobile tennis robot developed by SwitchBot. Unlike traditional ball machines that just shoot balls from one spot, Acemate moves around the court, catches balls, and hits them back to you – essentially acting as an opponent rather than a practice tool.
It was recently named one of TIME’s Best Inventions of 2025 and is the official supplier for the Billie Jean King Cup Finals 2025. You can buy it from this link.
We are currently testing this machine, so make sure to check back often or subscribe to our YouTube channel for the upcoming Acemate Review.
How it works
The robot uses binocular 4K cameras to track your shots. It sees where you hit the ball, analyses the trajectory and spin, then moves into position using four Mecanum wheels (specialised wheels that allow movement in any direction). Once it catches your ball, it returns it, either as a rally continuation or a serve.
This all happens quickly. The robot can move at up to 5 meters per second with a reaction time of 0.15 seconds, giving it full-court coverage.
Two operating modes
Rally Mode: You hit, the robot catches, returns, and you rally. It adapts to your level, serving easier balls to beginners and more challenging shots to advanced players.
Serve Mode: The robot serves to you across the full court. It can deliver serves up to 60 mph, hit balls with spin up to 60 revolutions per second, and lob as high as 8 meters.
Performance specs
- Movement speed: Up to 5 m/s
- Ball speed: Up to 60 mph
- Spin: Up to 60 RPS
- Lob height: Up to 8 meters
- Weight: 17.8 kg (~39.2 lbs)
- Dimensions (folded): 45 × 55 × 50 cm
- Dimensions (extended): 45 × 55 × 170 cm
- Runtime: Features a removable battery pack that provides up to 2-3 hours of continuous use per charge (depending on intensity) and takes about 2 hours to fully recharge.
- Court compatibility: Hard courts, clay, grass
Key features
AI Coaching: The robot’s cameras and AI algorithms watch your movements, shot placement and contact points. It provides feedback through an app with video playback, letting you review your form and stroke mechanics.
Gesture Control: Wave your hand to turn it on or off – no need to touch it during play.
Compact and Portable: When folded, it fits in most car trunks. It comes with a telescopic handle so you can roll it like a suitcase.
Drill System: The new drill system adds target zones and scoring to training sessions, turning casual practice into structured workouts with real-time tracking and post-session reports.
App Control: Tap the app to switch between modes, adjust difficulty or access training programs.
Real limitations worth knowing
Acemate can’t return every shot (just like real players). Extreme spins, sharp angles or very fast balls sometimes fall outside its optimal range. But it handles most standard rally exchanges reliably and is designed for typical training scenarios.
The ball sometimes gets by it, but since Acemate catches many balls during training, few actually strike the machine directly. It’s built with high-strength aluminum alloy so it can easily withstand impact from balls without being damaged easily..
Who is it for?
Club players training alone: Acemate solves the problem of needing a partner for meaningful practice.
Players working on specific skills: The drill system lets you focus on particular shots with feedback and scoring.
Intermediate to advanced players: The robot adapts to your level, making it useful across skill ranges, though it’s most effective above beginner level.
Not ideal if: You need constant, perfectly-placed balls for high-volume drilling (traditional ball machines might be better for this), or you’re a professional looking for match-practice specificity.
Recognition & Credibility
- TIME’s Best Inventions of 2025
- Official supplier for Billie Jean King Cup Finals 2025
- Featured in Forbes, CNET, The Verge, Tom’s Guide, The Telegraph
- 4.8/5 rating from 51 verified user reviews
- Endorsed by professional coaches (USTA/LTA certified)
- Tested by several pro players
Some practical considerations
Space required: Full court (or reasonable portion), outdoors or indoors.
Weather: Works on most surfaces but obviously weather affects outdoor play like any tennis.
Maintenance: Chargers via app-controlled power, Mecanum wheels may require occasional maintenance with heavy use.
Cost: Premium pricing reflects the AI and robotics technology. Not a budget option, but comparable to high-end coaching or clinic fees when considered as ongoing practice tool.
More than a traditional ball machine
Acemate is a genuinely novel piece of tennis equipment. It’s not trying to replace hitting with partners – it’s designed for people who don’t have partners available and want more than a traditional ball machine.
The AI adaptation and movement across the court make it fundamentally different from stationary machines. Whether the novelty translates to improved play depends on how you use the drill system and adapt your practice routines.
It’s especially valuable for players with inconsistent access to coaching or partners, or those looking to supplement their training with structured solo practice.
More Info: acematetennis.com
Availability: Ships globally
Warranty: 12-month global warranty
Returns: 30-day return policy
