Medical Department, Real Federacion Española de Futbol, Madrid, Spain.Faculty of Sport Science and Physical Education, University of A Coruña, Oleiros, A Coruña, Spain.Centre for Sport Studies, Rey Juan Carlos University, Fuenlabrada, Spain juan.delcoso@urjc.es.First Team Performance, Tottenham Hotspur Football Club, London, UK.Complex Systems in Sport Research Group, Institut Nacional d'Educació Física de Catalunya (INEFC), University of Lleida, Lleida, Catalunya, Spain.Faculty of Medicine, Complutense University of Madrid, Madrid, Spain.Board of Directors, Spanish Association of Football Teams Physicians, Madrid, Spain.First Team Performance, Tottenham Hotspur Football Club, London, UK.Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.Centre of Health Science, Faculty of Health, University of the Faroe Islands, Torshavn, Faroe Islands.Medical Services, Chelsea FC, London, London, UK.Board of Directors, Spanish Association of Football Teams Physicians, Madrid, Spain.