What is mini tennis?

Watch a kid try to play tennis on a full-sized court with a standard yellow ball and the problem becomes obvious pretty quickly - the court is enormous. The ball flies past before they can react. The racket weighs almost as much as their arm. They swing, miss, chase the ball to the back fence, and within ten minutes they want to go home.

Mini tennis fixes that. It is sometimes called short tennis or red ball tennis, and it is a scaled-down version of the game - smaller courts, slower balls, shorter rackets, simplified scoring.

Despite what the name might suggest, mini tennis is not a different sport. It is real tennis for kids, just sized to fit the player.

And, mini tennis is quite effective as a warm-up for adult players.

The idea behind mini tennis

The thinking is simple: match the equipment to the child.

A 5-yo is not a small adult. Their coordination, strength, attention span - all of it is still developing. Putting them on an adult court with a ball bouncing above their head is a bit like asking a seven-year-old to drive a car because they will grow into it eventually.

Coaches have been using foam balls and shortened courts informally for decades. But the ITF made it official in 2007, and in 2012 went a step further: from that year on, no player aged 10 or under should train or compete with a standard yellow ball on a full-sized court. That rule changed junior tennis worldwide.

The system works through a three-stage progression, colour-coded by ball type: red, orange, and green. Each stage uses a different court size, ball speed, and racket length that roughly matches the child's age and physical development.

The 3 stages of mini tennis

Red ball tennis (ages 4-8)

This is where everyone starts. Red ball tennis is the entry point for children aged 4 to 8 and the most common form of mini tennis you will see at clubs. Red balls are 75% slower than standard yellow balls and bounce much lower. The mini tennis court size at this stage is 11 metres long and 5.5 metres wide - about the footprint of a badminton court. Mini tennis rackets run 43-58 cm (17-23 inches).

Kids at this stage are learning to track the ball, make contact, and hold a basic rally. Because the ball is so slow, they actually have time to set up and take a proper swing rather than just sticking the racket out and hoping. That matters, because confidence - not technique - is what keeps young children coming back week after week.

Scoring is kept simple: first-to-7 or first-to-10, counting 1, 2, 3 instead of the traditional 15, 30, 40. Serves are underhand or a gentle drop-hit. The whole thing is built around fun and movement.

Orange ball tennis (ages 8-10)

Orange ball tennis is the next step, aimed at children aged 8 to 10. Orange balls are 50% slower than standard balls. The court grows to 18 metres long and 6.5 metres wide - roughly three-quarters of a full court. Rackets go up to 58-63 cm (23-25 inches). The mini tennis net height sits around 80 cm in the centre.

Technique starts to sharpen here. Children develop proper groundstrokes, learn to serve overhand, and begin to understand court positioning. There is enough pace and bounce to reward clean hitting and punish lazy footwork, but the ball is still forgiving enough to let them experiment.

Matches introduce more traditional elements - short sets (first to four games), with a match tiebreak if the sets split. This keeps things moving and gives kids more actual playing time.

Green ball tennis (ages 9-11)

Green balls are 25% slower than standard balls, played on a full-sized court. Rackets are 63-66 cm (25-26 inches). This is the bridge to the full game.

By this stage, players are working on topspin forehands, one or two-handed backhands, serves with a proper ball toss, volleys, and basic tactical patterns like approaching the net or building a point. The ball is just slow enough to give them an extra fraction of a second to execute, while still feeling close to the real thing.

Green ball tennis matches use two short sets (first to four games each) with a 10-point match tiebreak. Good preparation for competitive junior tennis.

Quick comparison of mini tennis stages

Mini tennis actually works

Children who start with properly sized equipment tend to develop better technique, stick with the sport longer, and enjoy it more than those who get thrown straight onto a full court. A few reasons stand out.

On a full court with yellow balls, beginners spend most of their time picking up balls. Put a five-year-old on a mini court with red balls and they can hold a rally of four or five shots within a few lessons. More rallies means more learning, and it happens fast.

When a ball comes in too fast and too high, kids compensate - they push the racket forward, block instead of swinging, chop down just to keep the ball in play. A slower ball at the right height lets them develop a proper swing path, decent footwork, and a natural follow-through. Those habits stick.

Nothing kills a child's interest faster than constant failure. Mini tennis flips that around - kids make contact, get the ball over the net, and feel like they are actually playing. That loop of small successes is what separates a child who plays for one term from one who plays for a decade.

The smaller court also means more movement relative to the playing area. Kids run, change direction, and adjust their position constantly, which develops coordination, balance, and agility alongside the tennis-specific skills. And on a court that small, they naturally figure out shot placement and basic tactics without anyone having to lecture them - hitting to the open side works, coming forward puts pressure on the opponent, lobbing over someone at the net is deeply satisfying.

Do pros play mini tennis?

Mini tennis is not something players outgrow. Virtually every professional on tour uses short court rallies as part of their practice.

Djokovic has been filmed doing mini tennis before practice sessions - sometimes hitting lefty forehands to warm up his non-dominant hand, which helps the feel on his two-handed backhand. When Karue Sell was Naomi Osaka's hitting partner, he posted a video of a typical practice session: they spent quite a bit of time on mini tennis, gradually backing up from the service line to the baseline while keeping the rally going. Swiatek, Azarenka, Gauff, Sinner, Fernandez, Raducanu - they all do some version of the same thing.

Andy Roddick talked about this on his podcast, saying mini tennis should be "time well spent on footwork, touch, whatever else you need to work on."

Yanick Sinner apparently does full strokes in slow motion during short court - much harder than the half swings most club players default to.

Another thing is that you rarely see pros do this on TV is timing. By the time they walk out for that 7-min pre-match warmup, they have already spent 40-60 minutes hitting on a practice court. Marin Cilic once mentioned that an 11am Wimbledon start meant getting up at 6am to fit his warmup in. The on-court routine before a match is mostly about adjusting to the specific court, the light, the wind - not about getting the body going.

Equipment: what you need

You do not need to spend much to get started.

Racket. Match the mini tennis racket size to your child's height, not their age. Have the child stand with the racket hanging at their side - the head should sit just above the ground. For most 4-6 year olds, that means a 19-21 inch racket. For 7-9 year olds, 23-25 inches. Any properly sized junior racket will do - no need to spend big at this stage.

Balls. Mini tennis balls - also called junior tennis balls or low compression tennis balls - come in red, orange, or green depending on the stage. Available from any tennis retailer for a few euros per pack. If your child is just starting out and you want to practise at home, grab some starter tennis balls in red regardless of age - they are the most forgiving and the most fun for raw beginners.

Court. You do not need a dedicated mini tennis court. The red-stage court fits inside the service boxes of a regular tennis court. The orange-stage court uses the singles sidelines with a shortened baseline. Many clubs mark these lines permanently. A useful tip: a standard pickleball court (13.4m x 6.1m) is almost the perfect size for mini tennis - right between the red and orange stage dimensions, with a net already at a lower height. If your local park has pickleball courts, they work well. Otherwise, cones or chalk lines in a driveway will do. A portable net or a rope between two chairs is enough for casual play.

Shoes. Any flat-soled trainers with decent grip are fine to start. Once your child is playing regularly on hard courts, proper tennis shoes with lateral support are worth it - kids change direction constantly and running shoes are not built for that.

Mini tennis for adults

Something most people do not think about: mini tennis is not only for children. Green balls (and even orange balls) work well for adult beginners learning tennis for the first time.

The logic is the same as tennis for kids. An adult picking up a racket for the first time faces the same problem - the standard ball moves too fast to develop any technique. Slowing things down with a green ball gives adult beginners time to focus on their swing, footwork, and timing rather than just reacting.

More and more clubs now use green balls in beginner adult group sessions. The Mouratoglou Academy specifically recommends progressive ball types for adult learners. If your coach hands you a yellow ball on day one, they are probably skipping a useful step.

Even experienced players use slower balls for specific drills - orange and red balls for touch exercises at the net, drop shot practice, or working on technique changes where you want to take pace out of the equation.

Mini tennis as a warmup

Try skipping the short court warmup at your local club and see what happens. For many serious players, mini tennis warmups are a recurring topic, and the opinions are strong.

"Never met a player 5.0 or above who does not want a short court warmup".

A 4.5-rated player put it more simply: "It's a skill to hit soft. Anyone can hit it hard."

The biggest complaint from experienced players? Partners who try to "win the warmup" by blasting the ball. Mini tennis is cooperative - you play with your partner, not against them. The point is to build a rhythm together, get the feet moving, find your timing, feel the ball on the strings. As a former college player explained, "winning the warmup" means reading your opponent, not outhitting them.

Also, there is an uncomfortable truth that keeps coming up: if you cannot hold a gentle rally on the short court, it says something about your ball control. "Short court warm up definitely exposes players who can't control the ball," one player noted. Another, rated 5.0, was more direct: "One of the biggest differences I see between okay and actually good players is the respect they give to mini tennis."

Players with semi-western or western grips - even at the 4.5 level - often find their forehand flying long during short court, no matter how much they try to slow down. One 4.5 player said about this exact struggle: "I hit with heavy topspin, and when I try to slow it down for mini tennis, it does not cooperate. Mostly going way long." The player needs to shorten the takeback. Do not try to decelerate a big swing - instead, start with the racket barely behind your body and focus on brushing up the back of the ball.

Other tips from players who have worked through this: give yourself more space from the service line than you think you need. Bend the knees and stay low. Focus on footwork and getting into position rather than reaching.

Mini tennis vs Touch tennis

One point of confusion worth clearing up: mini tennis and touch tennis are not the same thing.

Touch tennis is a separate sport created in London in 2002, played with a foam ball and a fixed 21-inch racket on a 12m x 5m court. It has its own rules, its own governing body, and its own competitive circuit. It is designed as a standalone game for adults, mostly in urban settings where space is tight.

Mini tennis, by contrast, is the ITF's structured developmental programme for children learning real tennis, using low compression balls (red, orange, green) on progressively larger courts.

The two look similar on the surface - small court, small racket - but the purpose and structure are completely different. If someone invites you to play "touch tennis," expect foam balls and a fast adult game. If they say "mini tennis," expect the red-orange-green ball system.

Finding a program

Most tennis clubs that offer junior coaching run mini tennis sessions. The LTA in the UK, the FFT in France, the USTA in the US, the RFET in Spain - all endorse the ITF's progressive ball system. Many have searchable databases of registered coaches and programmes on their websites.

The bigger picture

Mini tennis is not a gimmick. It is the product of decades of coaching research all pointing the same way: children learn best when the environment fits their abilities.

Nadal hit foam balls on a shortened court as a toddler. Djokovic started with mini tennis in Serbia. Alcaraz was rallying with red balls at a tennis academy in Murcia before he could read.

Most kids who start mini tennis will never play competitively, and that is fine. The point is giving them a good first experience with a sport that can stay with them for life. Tennis is one of the few things you can do from age four to eighty-four. Mini tennis is where that starts.

If your child is showing any interest, get them a properly sized racket, a bag of red balls, and look up the nearest mini tennis session. It might turn into something that lasts a long time.