{
  "title": "Tennis Development Cost Evidence Register, 2026",
  "version": "1.0",
  "published": "2026-08-09",
  "lastReviewed": "2026-08-09",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "methodology": "A dated register of independently sourced cost components. It is not a lifetime-cost calculator and does not invent country totals where comparable source data do not exist.",
  "importantCorrection": "The supplied prompt registry retained a USD 25,000 M25 purse. Current ITF calendars show USD 30,000 at M25; this file uses the current official amount.",
  "sources": [
    {"id":"F-005","market":"United States","measure":"National-level junior annual spend","value":"USD 30,000-100,000 per year","asOf":"2014","source":"Money citing Tim Donovan","url":"https://money.com/cost-to-raise-tennis-champion-wimbledon/","status":"dated benchmark"},
    {"id":"F-010","market":"IMG Academy","measure":"Full-year tennis boarding tuition","value":"USD 75,400-99,900 per year","asOf":"2026-27","source":"IMG Academy","url":"https://www.imgacademy.com/boarding-school/tennis","status":"primary current"},
    {"id":"F-020","market":"ATP Challenger Tour","measure":"Total annual prize money","value":"USD 32.4 million","asOf":"2026","source":"ATP Tour","url":"https://www.atptour.com/en/news/atp-challenger-tour-prize-money-record-rise-2026","status":"primary current"},
    {"id":"F-023","market":"ATP Challenger Tour","measure":"Calendar size","value":"265 events","asOf":"2026","source":"ATP Tour","url":"https://www.atptour.com/en/news/atp-challenger-tour-prize-money-record-rise-2026","status":"primary current"},
    {"id":"F-025-current","market":"ITF men's World Tennis Tour","measure":"Event purse","value":"USD 15,000 or 30,000","asOf":"2026","source":"ITF","url":"https://www.itftennis.com/en/tournament-calendar/mens-world-tennis-tour-calendar/","status":"primary current"},
    {"id":"F-026-current","market":"ITF women's World Tennis Tour","measure":"Event purse","value":"USD 15,000; 30,000; 40,000; 60,000; or 100,000","asOf":"2026","source":"ITF","url":"https://www.itftennis.com/en/tours/womens-world-tennis-tour/","status":"primary current"},
    {"id":"F-030-current","market":"Professional tour","measure":"Accounting break-even corridor","value":"Approximately ATP/WTA rank 150","asOf":"2026","source":"Schöttl et al.","url":"https://doi.org/10.1016/j.ssaho.2026.102986","status":"peer-reviewed open access"},
    {"id":"F-031-current","market":"2008 ITF junior top-100 cohorts","measure":"Positive career financial balance","value":"32-34 percent","asOf":"2026","source":"Schöttl et al.","url":"https://doi.org/10.1016/j.ssaho.2026.102986","status":"model-dependent"},
    {"id":"F-061-current","market":"United Kingdom","measure":"Marketplace average for private lessons","value":"GBP 39 per hour","asOf":"2026","source":"Superprof UK","url":"https://www.superprof.co.uk/lessons/tennis/united-kingdom/","status":"marketplace snapshot; inclusions vary"},
    {"id":"F-062-current","market":"France","measure":"Marketplace average for private lessons","value":"EUR 40 per hour","asOf":"2026","source":"Superprof France","url":"https://www.superprof.fr/cours/tennis/france/","status":"marketplace snapshot; inclusions vary"},
    {"id":"F-063-current","market":"Spain","measure":"Marketplace average for private lessons","value":"EUR 23 per hour","asOf":"2026","source":"Superprof Spain","url":"https://www.superprof.es/clases/tenis/espana/","status":"marketplace snapshot; inclusions vary"},
    {"id":"F-064-current","market":"Germany","measure":"Marketplace average for private lessons","value":"EUR 46 per hour","asOf":"2026","source":"Superprof Germany","url":"https://www.superprof.de/unterrichtsangebot/tennis/deutschland/","status":"marketplace snapshot; inclusions vary"},
    {"id":"F-065-current","market":"Italy","measure":"Marketplace average for private lessons","value":"EUR 26 per hour","asOf":"2026","source":"Superprof Italy","url":"https://www.superprof.it/lezione/tennis/italia/","status":"marketplace snapshot; inclusions vary"},
    {"id":"F-066-current","market":"Czech Republic","measure":"Prague club coach fee","value":"CZK 540 per hour","asOf":"2026","source":"Tempo Tenis Prague","url":"https://www.tempotenis.cz/kurzy-tenis-pro-dospele-praha-4","status":"primary price; court charged separately"},
    {"id":"F-067-current","market":"Poland","measure":"Major-city individual lesson listings","value":"PLN 110-189 per hour","asOf":"2024","source":"KS Tennis Life","url":"https://kstennislife.com.pl/ile-kosztuje-lekcja-tenisa-kompleksowy-cennik-roznych-wariantow-nauki","status":"club-listing comparison; not a national average"},
    {"id":"ST-001","market":"Stakhovsky Tennis","measure":"On-court performance assessment","value":"CZK 3,400 for 90 minutes","asOf":"2026","source":"Stakhovsky Tennis","url":"https://stakhovskytennis.com/tennis-coaching-prices-prague","status":"first-party current"},
    {"id":"ST-002","market":"Stakhovsky Tennis","measure":"Monthly technical development","value":"CZK 4,500-7,500 per month","asOf":"2026","source":"Stakhovsky Tennis","url":"https://stakhovskytennis.com/tennis-coaching-prices-prague","status":"first-party current"}
  ]
}