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This method helps identify the best-ranked players in defending play, designated as Defensive Golden Players. The study was organized in two main phases: (1) selection, definition, and validation, including weighting assignment, of a set of variables associated with players\u2019 defensive performance by applying statistical techniques to standardize variable values that compose the DGI formula; and (2) applicability of the DGI formula to rank players\u2019 performance of F\u00fatbol Club Barcelona (FCB) according to the opponents\u2019 level in 38 games of La Liga 2018\u20132019. A set of variables (e.g. tackles, anticipation, successful interception, successful 1\u2009\u00d7\u20091 defensive) were included in a questionnaire and (re)conceptualized based on previous literature and author\u2019s experience as coaches and match analysts. The survey was reviewed by 11 football experts to ascertain the importance of variables, as well as validate and determine the weight of each variable. Each defensive variable was divided by the time played. Then the individual values were subtracted from the mean and divided by the standard deviation of the variable. The results of the DGI formula were obtained by multiplying the weights from the experts for each of the 12 standardized defensive variables by the sum of each variable. In general, the best-ranked FCB players (Defensive Golden Players) were Gerard Piqu\u00e9, Clement Lenglet, and Sergio Busquets. Moreover, considering the opponents\u2019 levels, the same players were best-ranked, however, with different order in the top three positions. The DGI formula is a valuable method for capturing individual and collective performance of football players in defending play.<\/jats:p>","DOI":"10.1177\/17543371211008794","type":"journal-article","created":{"date-parts":[[2021,4,10]],"date-time":"2021-04-10T02:42:53Z","timestamp":1618022573000},"page":"209-220","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["The Defensive Golden Index: A novel method to rank football player defensive performance for F\u00fatbol Club Barcelona"],"prefix":"10.1177","volume":"236","author":[{"given":"Rui","family":"Ferreira","sequence":"first","affiliation":[{"name":"Faculty of Sport, University of Porto, Porto, Portugal"}]},{"given":"Sara","family":"Pereira","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Porto, Porto, Portugal"},{"name":"CIFI2D, Centre for Research, Education, Innovation and Intervention in Sport, University of Porto, Portugal"},{"name":"Centro de Investiga\u00e7\u00e3o em Desporto, Educa\u00e7\u00e3o F\u00edsica e Exerc\u00edcio e Sa\u00fade, Universidade Lus\u00f3fona, Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9559-378X","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Porto, Porto, Portugal"},{"name":"CIFI2D, Centre for Research, Education, Innovation and Intervention in Sport, University of Porto, Portugal"}]},{"given":"J\u00falio","family":"Garganta","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Porto, Porto, Portugal"},{"name":"CIFI2D, Centre for Research, Education, Innovation and Intervention in Sport, University of Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2701-2303","authenticated-orcid":false,"given":"Daniel","family":"Barreira","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Porto, Porto, Portugal"},{"name":"CIFI2D, Centre for Research, Education, Innovation and Intervention in Sport, University of Porto, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2021,4,9]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1080\/24748668.2004.11868295"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.15561\/20755279.2017.0602"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2014.898852"},{"key":"e_1_3_2_5_2","volume-title":"The coaching philosofies of Louis Van Gaal and the Ajax coaches","author":"Kormelink H","year":"1997","unstructured":"Kormelink H, Seeverens T. 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