Michal Bozděch

Rising performance-efficiency demands in female junior tennis: A longitudinal analysis of ITF World Tennis Tour Juniors rankings, 2004–2025

Long-term changes in ranking-point production efficiency among female players on the ITF World Tennis Tour Juniors were examined between 2004 and 2025. Year-end ranking data comprised 8,510 player-year observations from 5,919 players aged 12–18 years. Elite status was defined ann...

Junior performance efficiency in relation to professional ranking entry and career-high ranking in male tennis players

Identifying junior performance characteristics associated with subsequent professional ranking outcomes remains an important challenge in tennis player development. This retrospective observational study examined associations between junior performance indicators and two distinct...