Tennis Physical & Performance Standards: Serve Speed, Height & Fitness Tests by Age

The Serve Is a Weapon. So Is the Body Behind It.

Tennis doesn’t have a scouting combine, but national federations test their juniors every year. Researchers have pooled that testing into some of the best normative data in any sport. A 2025 meta-analysis brought together results from 8,008 competitive youth tennis players. Research on German national juniors adds a clear headline: serve velocity and upper-body power are the physical qualities most closely tied to junior ranking.

Here’s what the pros serve, how tall they are, and what juniors at every age actually produce on the test battery.

Tennis Testing Protocols

Serve velocity. Measured with a radar gun. In the standard German junior protocol, the radar sits on the centre of the baseline, 4 m behind the server, at about contact height. Players hit 8 maximal first serves down the T, and the average speed is recorded.

Countermovement jump (CMJ). A vertical jump with a quick dip and arm swing, measured in centimetres. It tests lower-body power.

10 m and 20 m sprint. Straight-line acceleration from a standing start, timed with electronic gates.

5-0-5 agility. The player sprints in, then makes a 180° turn and sprints back out through the 5 m timing zone. It tests change of direction, the movement tennis demands on every wide ball.

Overhead medicine ball throw. A two-handed overhead throw for distance. It tests upper-body and trunk power, the same chain that drives the serve.

Handgrip strength. Measured with a dynamometer on the dominant hand, in kilograms.

Hit & Turn tennis test. A progressive, on-court endurance test. Players move side to side, shadowing forehands and backhands to an audio signal that speeds up until they can’t keep pace.

Professional Serve Speed Standards (Grand Slams)

Average serve speeds across the four Grand Slam events, 2002–2013, analysed by Rod Cross for the ITF Coaching & Sport Science Review. The averages cover every player in every match where serve speeds were recorded.

Men vs. women: men’s first serves averaged 25.6 km/h faster, their second serves 17.0 km/h faster, and their top serves 33 km/h faster.

Note: neither the ATP nor the WTA publishes an official tour-wide average serve speed. These Grand Slam figures are the most complete published averages.

Professional Height Standards (ATP & WTA Top 20)

Players ranked in the ATP and WTA top 20, 2003–2023 (Carboch & Vašíčková, 2025):

What this tells you: top-20 men have grown about 5 cm taller in 20 years, while their body weight has not gone up. The modern elite player is taller and leaner. Height helps the serve, but the range (170–211 cm for men) proves there’s room at the top for players who win with speed and movement.

Youth Serve Speed by Age

Pooled averages from a 2025 systematic review and meta-analysis of 8,008 competitive youth tennis players (Eur J Sport Sci).

*Very small sample (girls U14: 4 players; girls U16: 11 players). Treat these as rough guides only.

Elite junior benchmark: in German regional and national squads, U16 boys averaged about 168–172 km/h and U17 boys about 169–178 km/h, depending on birth quarter (Ulbricht et al., 2015). That is well above the pooled average for the same ages.

Youth Tennis Fitness Test Norms by Age

Pooled averages from the same 2025 meta-analysis. A dash (—) means no pooled value was reported for that age group.

Boys

Girls

*Small sample (fewer than 25 players). The authors report high variation between studies, so differences between neighbouring age groups (for example, the girls’ U16 dip) are likely to reflect the samples studied more than real decline. Use these as reference ranges, not hard cut-offs.

Key Physical Qualities for Tennis

Serve Velocity & Upper-Body Power

In a study of 902 German junior players aged 11–16, serve velocity and upper-body power (medicine ball throws) were the physical qualities most strongly correlated with national ranking, for both boys and girls. National squad players beat regional players most clearly in exactly these tests (Ulbricht et al., 2016).

Relevant tests: Serve velocity, overhead and rotational medicine ball throws

• How to improve it: build shoulder, trunk and hip strength, then turn it into speed with overhead and rotational work. The foundation is training the legs, because the serve starts from the ground and the force comes up from it.

Lower-Body Power

Relevant test: Countermovement jump

• Junior boys’ CMJ climbs from about 30 cm at U12 to about 38–39 cm by U17–U18.
• How to improve it: strength training for the legs plus jump and bound progressions. Power drives the split step, the first step and the serve.

Acceleration & Change of Direction

Relevant tests: 10 m / 20 m sprint, 5-0-5 agility

• Most tennis points are won or lost in the first few steps. 10 m times drop from about 2.03 s at U12 to about 1.77 s for U18 boys.
• How to improve it: short acceleration sprints, deceleration and braking drills, and compound, reactive and explosive strength training so you can stop, plant and push back the other way.

Grip & Forearm Strength

Relevant test: Handgrip dynamometer (dominant hand)

• Boys’ grip more than doubles between U12 (22 kg) and U18 (50 kg).
• How to improve it: grip and forearm work alongside full-body strength training, with balanced work for the non-dominant side.

Tennis-Specific Endurance

Relevant test: Hit & Turn tennis test

• Matches can run for hours of repeated short sprints. In the German data, national squad juniors also tended to outscore regional players on specific endurance, though the gap varied a lot by age group.
• How to improve it: repeated-sprint and on-court interval work, built on a solid aerobic base.

How Strong Are Tennis Players?

There’s no published relative-strength norm (squat or bench vs. bodyweight) for tennis players. The best published strength and power norms come from competitive juniors. Here’s how they change from U14 to U18 (Axman et al., 2025):

Pooled averages from a meta-analysis of 8,008 competitive youth players. Full age-by-age tables are above. Upper-body power matters most: in German national and regional juniors, medicine-ball throws were among the tests most strongly tied to ranking (Ulbricht et al., 2016).

Don’t know your numbers? We’ll test you properly.

How to Use These Numbers

1. Test the battery: serve speed, CMJ, 10/20 m sprint, 5-0-5, medicine ball throw and grip.
2. Compare to your age group, keeping in mind that early and late developers can sit a long way apart at the same age.
3. Find the weak link. If your serve is slow but your jump is strong, the gap is likely upper-body power or technique. If both are low, start with strength.
4. Retest every 8–12 weeks to make sure the training is working.

Not in Toronto? Our online coaching program brings the same testing-driven Remapping system to tennis players anywhere, built around your numbers and your schedule.

Conclusion: Build the Engine Behind the Serve

The data is clear. The players who climb the rankings serve faster, throw farther and move first. Technique matters, but every junior coach is coaching technique. The edge comes from building the power, speed and durability that let technique hold up at full speed, in the third set, at the end of a long season.

Sources

DATA LAST UPDATED: OCTOBER 2026