I will admit something before we start. Before my first session with the Acemate S10, I had mentally filed it away as a bit of a gimmick. A ball machine that drives itself around the court and catches your shots sounded over-engineered, and I had convinced myself that all you really need from a machine is a consistent feed so you can groove your technique. My first session put that idea to bed. It was the most fun I have had in a practice session, and probably one of the most useful too. There is one significant drawback, which I will get to, but the headline is that this machine changed my mind about what the moving, rallying concept is actually for.
Quick verdict
The Acemate S10 delivers on its big promise as the movement is no party trick. Reacting to a machine that repositions itself between shots makes practice feel far closer to a real hit than any static feeder I have used, and the camera tracking works without you wearing any sensors. Build quality is the best of the new generation of AI machines I have tested, which you would hope for given it is also the heaviest and the most expensive of them. That weight is the catch. If you need to lug it in and out of a car and across a club to reach your court, the portability will test your patience. For players with easy court access, a private court or storage on site, (or if you just don’t mind the extra effort it takes to get set up) it is a seriously powerful training tool.
Key specifications
| Specification | Detail |
|---|---|
| Weight | 17.8kg |
| Dimensions (folded) | 45 x 55 x 50cm |
| Dimensions (net extended) | 45 x 55 x 170cm |
| Maximum ball speed | Up to 97 km/h |
| Spin | Up to 60 revolutions per second |
| Lob height | Up to 8 metres |
| Movement speed | Up to 5 metres per second |
| Reaction time | 0.15 seconds |
| Cameras | Dual 4K binocular vision |
| Wheels | 4 metal-core Mecanum wheels with rubber treads |
| Built-in drills | 40+, structured around ITN assessment standards |
| Battery | Removable, up to 2 hours of use per charge |
| Court surfaces | Hard, clay and grass |
| Warranty | 12 months |
Setup & build quality
First impressions out of the box were good. The S10 feels solid and properly put together, and I would say the build quality is a step above the other new-generation machines I have tested. Given it is the heaviest and priciest of that group, that is what you would expect, but it is reassuring to see the money in the materials. The frame and the poles for the catching net are aluminium rather than plastic, and nothing about it feels flimsy.
The initial assembly is a faff, and I would strongly recommend doing it at home before you get anywhere near a court. Work out how the pieces fit together in your living room, not while your court time ticks away. Once the initial build is done you can partially fold it down for transport, so it is a one-off job rather than something you repeat every session.
Two small notes from the build. The fastenings that attach the catching net are much better quality than I expected. They feel like they will not break, and just as importantly, you can undo and redo them to reconfigure the setup without worrying about affecting how it performs. Less impressive was the screwdriver in the box, which seemed to be the wrong size for the screws that attach the arms to the frame. I struggled with it, swapped to a slightly bigger head from my own toolbox, and the problem disappeared. A minor thing, but worth knowing before you start.
The Acemate can be broken down into two sections and the arms are telescopic. It’s worth attaching the net and arms before you get to the courts for your first hit – it’ll save your court time!
What it is like to rally with
This is where the S10 won me over. My scepticism about the moving concept came from the fact plenty of static machines can already move you around the court with programmed patterns, so I did not see what driving the machine itself around would add. The answer is that it gives you something to react to.
With a static machine you always know where the next ball is coming from. Even on a randomised pattern, the feed point never changes, and I have noticed over time that this leads to slightly unrealistic practice. There is no target to watch, nothing to read, and if I am not careful I end up stood at the back of the court whacking balls as hard as I can, which is enjoyable but not productive. With the S10 repositioning itself between shots, I found myself watching the machine, adjusting my recovery and thinking about where the next ball was coming from. It is a small change on paper and a big one in practice. I came away from a couple of my sessions feeling like I had worked on more than I had from other sessions with static machines.
It moves quickly too. The official figures say up to 5 metres per second with a 0.15 second reaction time, and while I was not out there with a stopwatch, it certainly shifts. Ball speed and accuracy were both good throughout, and the returns come back with a rhythm that feels much closer to hitting with a partner than being fed by a hopper.
One environmental note. On the tarmac-style hard courts we have here in the UK, the S10 is quite loud when it is moving around. I tested mostly at quiet times when I had the courts to myself and it was not an issue, but if your club is busy, the noise might raise a few eyebrows on the next court. That is as much about the surface as the machine, and I would expect it to be quieter on smoother acrylic courts.
Drills & training modes
The S10 comes with a large library of built-in drills, structured around ITN assessment standards, and the ones I used were good. Across my session I worked through forehand and backhand crosscourt patterns and short-deep drills, which covered everything I actually wanted to work on, and I only scratched the surface of the full list. You can also build your own drills in the app, setting feed interval, height, direction, speed, spin and ball count.
A detail I really rate is that many drills let you switch the movement off entirely. Not every exercise benefits from a moving target, and sometimes you just want a consistent feed to a spot. Being able to turn the S10 into a standard ball machine with a tap means you are not locked into the rally concept when it does not suit the work you are doing. It effectively gives you two machines in one, and if you want to see how the dedicated static machines handle that side of things, my reviews of the Pongbot Pace S Pro and PUSUN PT Max C cover the alternatives.
The cameras work Well
I went in doubting this part as much as the movement. The S10 relies entirely on its dual 4K cameras to track you and the ball, with no sensors clipped to your clothing or the net, and in my session it worked without a hitch. It picked me up straight away and read the flight of the ball easily, including shots I did not exactly middle. Some rival machines need wearable sensors to do their player tracking, so getting this level of responsiveness from vision alone is impressive, and it is one less thing to mess around with at the start of a session.
What it will not do
It is worth being clear about what the catching concept is and is not. The S10 does not catch every ball you hit, and treating that as a failure misses the point. If you are rallying crosscourt and keeping your shots in a reasonable channel, it moves back and forth and gathers most of them. If you are hitting forehands down the line and suddenly rip a backhand crosscourt, it will set off after the ball, but it is not going to make it. Acemate says as much themselves.
The way to think about it is as a reward for control. If you want the rally to continue, you need to hit the zone the machine can cover, which quietly turns every rally into a placement exercise. Balls it does not catch end up around the court like any other machine session, so you will still be picking up. The hopper capacity is lower than most static machines carry, but because it catches and reuses so many balls mid-drill, I found I was collecting less often than the raw capacity suggests, though as ever that depends on how clean your hitting is.
Portability is the drawback
Now the downside I trailed at the start. The S10 is heavy, and it is awkward to move around off the court. I run a decent-sized car and still ended up with the machine on the front passenger seat, which is not where you want a 17.8kg robot. Getting it out of the car, through two gates and up a step to reach my nearest courts was a proper effort, and that is with about as easy an access situation as most club players could hope for.
It also feels like a solvable problem, and there are two things I would love to see in a future version. The first is an extendable handle with mounted wheels, the same approach Pongbot takes, so you could tilt the machine and roll it from car to court instead of carrying it. The second seems an obvious fit for what the S10 already is. Electric golf trolleys have offered follow modes for years, trailing their owner down the fairway automatically, and this is a machine with cameras that track a moving player and wheels quick enough to chase down a ball. Letting it follow you through the gates and onto court would remove the biggest complaint about it in one go.
Realistically, as things stand, that friction would put me off using it for a quick casual hit, and I say that as someone who really enjoyed the sessions themselves. It is the same trade-off the traditional heavyweight machines have always asked you to make, which I have covered before in my Lobster ball machine review. The players this machine suits are coaches with storage at the courts they work from, anyone lucky enough to have a private court, and players whose club setup lets them get from boot to baseline without a hike. If that is you, the biggest objection to the S10 disappears.
The boot of my old 4 series had no chance.
How it compares
Against the other AI machines I have tested, the S10 offers something none of them do. The Pongbot Pace S Pro and Tenniix are both excellent static feeders with clever tracking features, and they are far easier to carry, but neither gives you a moving target to react to. After using the S10, that difference feels bigger than I expected. You get more from a session with this machine than with a standard ball machine, and more than with the other AI feeders too, provided you can live with the logistics.
At the other end of the spectrum, something like the Slinger Bag makes the opposite trade. Maximum portability, minimum intelligence. Where you sit between those poles comes down to how you get to your court and how you like to train. My best tennis ball machines guide lays out the whole market, and if the S10 is beyond the budget, the second hand buying guide is worth a read too.
Who should buy the Acemate S10
Buy it if you are a coach with on-site storage, you have a private court, or your club access is easy enough that a heavy machine is no obstacle. It rewards players who want realistic, reactive practice rather than pure repetition, and the option to disable movement means it still covers conventional drilling. Improvers working on placement will get a lot from the way the catching mechanic pushes you to control your targets.
Think twice if your routine involves hauling a machine in and out of a car, through gates and across a park every session. The S10 will frustrate you before you ever switch it on, and a lighter machine you actually use beats a better machine that stays in the garage.
Final assessment
I expected to write the S10 up as an over-engineered curiosity, and instead it delivered some of the best ball machine sessions I have had. The build quality backs up the premium positioning, the cameras track without wearables or fuss, the drill library covers real training needs, and the moving, catching, returning concept turns out to be the genuine step forward. Portability is the price you pay, in both senses, and it is the one factor that should decide whether this machine is right for you. If your court access can absorb it, the Acemate S10 is the most compelling ball machine I have tested.
- Lobster Ball Machine Review
- The Best Tennis Ball Machines
- Pongbot Pace S Pro Review
- Tenniix Review
- PUSUN PT Max C Review
- Slinger Bag Review
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