{
  "id": "BAC-01",
  "title": "Junior-to-Pro Conversion Rates in Tennis: Verified Extract",
  "version": "1.0",
  "published": "2026-08-09",
  "lastReviewed": "2026-08-09",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "reviewStatus": "Editorial evidence review; not externally peer reviewed",
  "method": "Faithful extraction of the published bottom-up and top-down percentages in Brouwers, De Bosscher and Sotiriadou (2012). No new player-level analysis was performed.",
  "primarySource": {
    "title": "An examination of the importance of performances in youth and junior competition as an indicator of later success in tennis",
    "doi": "10.1016/j.smr.2012.05.002",
    "doiUrl": "https://doi.org/10.1016/j.smr.2012.05.002",
    "openManuscript": "https://research-repository.griffith.edu.au/bitstream/10072/47111/1/78825_1.pdf"
  },
  "fields": [
    "analysis_direction",
    "sex",
    "population_band",
    "target_band",
    "rate_pct",
    "denominator_n",
    "cohort_window",
    "observation_end"
  ],
  "rows": [
    {"analysis_direction":"forward","sex":"male","population_band":"ITF junior year-end top 20","target_band":"ATP top 200","rate_pct":65.8,"denominator_n":202,"cohort_window":"1988-1999","observation_end":2008},
    {"analysis_direction":"forward","sex":"male","population_band":"ITF junior year-end top 20","target_band":"ATP top 100","rate_pct":43.6,"denominator_n":202,"cohort_window":"1988-1999","observation_end":2008},
    {"analysis_direction":"forward","sex":"male","population_band":"ITF junior year-end top 20","target_band":"ATP top 20","rate_pct":16.8,"denominator_n":202,"cohort_window":"1988-1999","observation_end":2008},
    {"analysis_direction":"forward","sex":"female","population_band":"ITF junior year-end top 20","target_band":"WTA top 200","rate_pct":64.6,"denominator_n":175,"cohort_window":"1988-1998","observation_end":2007},
    {"analysis_direction":"forward","sex":"female","population_band":"ITF junior year-end top 20","target_band":"WTA top 100","rate_pct":45.7,"denominator_n":175,"cohort_window":"1988-1998","observation_end":2007},
    {"analysis_direction":"forward","sex":"female","population_band":"ITF junior year-end top 20","target_band":"WTA top 20","rate_pct":11.4,"denominator_n":175,"cohort_window":"1988-1998","observation_end":2007},
    {"analysis_direction":"reverse","sex":"male","population_band":"ATP year-end top 20","target_band":"Previously reached ITF junior top 200","rate_pct":76.5,"denominator_n":68,"cohort_window":"2000-2008","observation_end":2008},
    {"analysis_direction":"reverse","sex":"male","population_band":"ATP year-end top 20","target_band":"Previously reached ITF junior top 100","rate_pct":66.2,"denominator_n":68,"cohort_window":"2000-2008","observation_end":2008},
    {"analysis_direction":"reverse","sex":"male","population_band":"ATP year-end top 20","target_band":"Previously reached ITF junior top 20","rate_pct":44.1,"denominator_n":68,"cohort_window":"2000-2008","observation_end":2008},
    {"analysis_direction":"reverse","sex":"female","population_band":"WTA year-end top 20","target_band":"Previously reached ITF junior top 200","rate_pct":81.6,"denominator_n":60,"cohort_window":"1999-2007","observation_end":2007},
    {"analysis_direction":"reverse","sex":"female","population_band":"WTA year-end top 20","target_band":"Previously reached ITF junior top 100","rate_pct":75.0,"denominator_n":60,"cohort_window":"1999-2007","observation_end":2007},
    {"analysis_direction":"reverse","sex":"female","population_band":"WTA year-end top 20","target_band":"Previously reached ITF junior top 20","rate_pct":40.0,"denominator_n":60,"cohort_window":"1999-2007","observation_end":2007}
  ]
}