Markus Gaebel

Tennis has the most documented player base in racquet sports: 25.7 million U.S. players — 13.0 M core, 12.7 M casual. Regular plus avid players make up 28.6%, the highest engaged share of any racquet sport. It is also the only one whose core players (average age 43) are older than its casuals (33), with a balanced 53/47 gender split, +9.7 years of added life expectancy, and an 80% junior drop-out by 13 that still feeds a deep, multi-decade competitive core for operators and investors.

Badminton has the world's largest player base — over 220 million — yet the smallest commercial footprint. The reason is the series' core lesson: the sport is never the variable, the facility is. Asia built mass participation through public halls and schools; France engineered a durable club base; Britain runs a wide but casual public-hall game; Germany built a commercial base in the 1990s and lost it, exactly as squash did; the US and Australia built no base at all. One sport, five outcomes.

For operators, investors and federations: four squash markets, three trajectories. Egypt's member-club system produces global elite dominance from 2,000–2,500 courts. The US builds a Type 2/3 college pipeline (65 varsity teams). Europe and Australia/NZ run Type 1 commercial models in erosion — England 4,200 courts; Australia 1,300→580 in 20 years. Facility type, not the sport, drives outcomes — and the strategic Brisbane 2032 case is the one the WSF isn't making.