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Hernandez, Julia ORCID: https://orcid.org/0009-0001-2948-5174, Widmer, Chantal ORCID: https://orcid.org/0009-0006-6209-8770, Abbott, Shaun ORCID: https://orcid.org/0000-0002-6111-1033, Cobley, Stephen, Born, Dennis-Peter ORCID: https://orcid.org/0000-0002-1058-4367, Kern, Raphael, Tschopp, Markus ORCID: https://orcid.org/0009-0007-3446-2907, Taube, Wolfgang ORCID: https://orcid.org/0000-0002-8802-2065 and Romann, Michael ORCID: https://orcid.org/0000-0003-4139-2955 (2026) Improving longitudinal performance assessment of youth soccer players: 10 m sprint percentile curves adapted to biological age. Science and Medicine in Football. pp. 1-12.