Tennis looks like one of the lower-risk youth sports. No contact, no high-velocity collisions, indoor or outdoor surfaces with predictable conditions. The injury data tells a different story for competitive young players. The repetitive overhead motion, the unilateral demand on one side of the body, and the high training volumes in serious junior tennis produce a specific injury profile.
The list below is what shows up most in published youth-tennis epidemiology, ranked by frequency.
One. Shoulder overuse injuries. The serve motion produces shoulder load similar to baseball pitching. Adolescent players logging high serving volume develop rotator cuff inflammation, labrum injuries, and shoulder impingement.
The published prevention research:
Volume management. Limits on serve volume per session and per week.
Dryland strengthening focused on rotator cuff and scapular stabilizers.
Technique work that distributes load across the kinetic chain rather than overloading the shoulder.
Programs that integrate strength-and-conditioning specific to tennis produce fewer shoulder injuries.
Two. Lateral epicondylitis (“tennis elbow”) and medial epicondylitis (“golfer’s elbow”). Repetitive forearm extension and flexion under load produces tendinopathy at the elbow attachments.
In adolescent players, the apophysitis variant (“Little League elbow” for the medial side) can occur in tennis at high training volumes. Persistent elbow pain in a young player warrants pediatric sports-medicine evaluation.
Three. Lower-back injuries. The serve and forehand motion involve significant lumbar rotation and extension. Adolescent players develop low-back pain at higher rates than the general youth population. Spondylolysis (stress fracture in the lumbar pars interarticularis) is documented.
Four. Heat illness. Outdoor tennis in summer heat. Tournaments often run all day in significant heat. Heat acclimatization, hydration, modification of practice intensity in extreme conditions all apply.
The USTA’s heat-policy framework provides guidance for tournaments. Programs in heat-prone regions should be aware and compliant.
Five. Knee injuries. Patellar tendinopathy from repetitive jumping (serve motion, overhead approach). Less acute than in jumping sports but cumulative.
Six. Eye injuries. Tennis balls strike eyes at relatively low rates in tennis itself (tennis-ball-to-eye is rare) but eyewear from impact during doubles play, with errant racquets, or in mixed-discipline practice (racquet sports played on the same court) does occur.
Polycarbonate impact-resistant lenses for kids who wear glasses. The American Academy of Ophthalmology recommends sport-eyewear for tennis specifically because of the racquet-and-ball combination, though tennis itself is lower-risk than squash or racquetball.
Seven. Ankle injuries. Lateral cutting on hard courts produces ankle sprains. Hard courts produce higher injury rates than clay; clay rewards sliding and reduces impact.
The catastrophic risks, in proportion.
Sudden cardiac arrest in adolescent tennis players is rare but documented. AED on-site at tournaments, CPR-trained adults.
Heatstroke during summer competition. Cool first, transport second protocol.
What parents should ask before signing up.
“What is the serve-volume tracking for junior players?”
“What is your dryland strengthening approach?”
“What is your concussion protocol?” (Less frequent in tennis but still applicable.)
“What is your heat policy at tournaments?”
“What is your strategy for managing persistent shoulder, elbow, or back pain?”
A program with answers is one that has done the work.
The specialization question.
Junior tennis culture sometimes pushes early specialization. The American Academy of Pediatrics’ position on youth sport specialization is consistent: avoid specialization before age 14 to 16, ensure at least one month off from a primary sport per year, and play multiple sports through adolescence when possible.
For families with talented young players, the recruiting and tournament pressure can incentivize specialization. The cost shows up in published overuse-injury data and dropout rates.
The hard-court vs clay-court vs grass question.
Hard court (most common in U.S. junior tennis). Higher impact loads on knees, ankles, lower back. Faster game, more acute injuries.
Clay court. Lower impact loads, allows sliding, rewards strategy and endurance over power. Many published injury studies show lower acute injury rates on clay than on hard court.
Grass. Specialty surface, rare in U.S. junior tennis.
For families with kids in heavy junior-tennis schedules, surface variety reduces cumulative load. Programs that train only on hard court produce higher cumulative injury rates than programs that mix surfaces when feasible.
The honest read. Tennis is a lifelong sport with real overuse patterns specific to the repetitive overhead motion and unilateral demands. Junior players in high-volume programs face documented shoulder, elbow, back, and heat-illness risks. The protective measures are well-published and largely free: volume management, dryland strengthening, technique work, surface variety when possible, and attention to the specialization question.
The kids who play into adulthood and college are usually the kids whose programs and families took the long-view approach to training load and injury prevention.