{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T16:38:06Z","timestamp":1788194286433,"version":"build-2803163510"},"reference-count":35,"publisher":"Public Library of Science (PLoS)","issue":"10","license":[{"start":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T00:00:00Z","timestamp":1759881600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000072","name":"National Institute of Dental and Craniofacial Research","doi-asserted-by":"publisher","award":["R01DE031025"],"award-info":[{"award-number":["R01DE031025"]}],"id":[{"id":"10.13039\/100000072","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["2238208"],"award-info":[{"award-number":["2238208"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>COVID-19 significantly impacted sports tournaments, particularly soccer. During the pandemic, restrictions on spectators and frequent team composition changes due to outbreaks, providing a unique opportunity to explore the effects on team performance and home advantage (HA). In this study, we have two focuses. We first introduce a new extended Bradley-Terry model. The proposed model demonstrated several advantages over existing models, particularly in terms of stability, ease of implementation, and interpretation. It can be applied to any sport featuring home and away dynamics. The second focus is to apply the proposed model to data from the English Premier League over the past ten seasons. The analysis aims to evaluate changes in team rankings and home advantage before, during, and after the pandemic disruptions. Our findings indicate marked fluctuations in team performance and home advantage during the pandemic, with a distinct shift in team dynamics and competitive balance under pandemic restrictions.<\/jats:p>","DOI":"10.1371\/journal.pone.0332627","type":"journal-article","created":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T17:27:03Z","timestamp":1759944423000},"page":"e0332627","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":3,"title":["Impact of COVID-19 on English Football Premier League: Analyzing rankings and home advantage using extended Bradley-Terry models"],"prefix":"10.1371","volume":"20","author":[{"given":"Hong 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Quarterly."},{"issue":"11","key":"pone.0332627.ref005","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pone.0289899","article-title":"The impact of crowd effects on home advantage of football matches during the COVID-19 pandemic-A systematic review","volume":"18","author":"S Wang","year":"2023","journal-title":"PLoS One."},{"issue":"3","key":"pone.0332627.ref006","doi-asserted-by":"crossref","first-page":"530","DOI":"10.1093\/jrsssa\/qnad007","article-title":"Assessing competitive balance in the English Premier League for over forty seasons using a stochastic block model","volume":"186","author":"F Basini","year":"2023","journal-title":"Journal of the Royal Statistical Society: Series A."},{"issue":"3","key":"pone.0332627.ref007","doi-asserted-by":"crossref","first-page":"519","DOI":"10.1080\/19406940.2024.2323012","article-title":"Impact of the UEFA Nations League on competitive balance, competitive intensity, and fairness in European men\u2019s national team football","volume":"16","author":"N Scelles","year":"2024","journal-title":"International Journal of Sport Policy and Politics."},{"issue":"3","key":"pone.0332627.ref008","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1111\/j.1467-9574.1982.tb00782.x","article-title":"Modelling association football scores","volume":"36","author":"MJ Maher","year":"1982","journal-title":"Statistica Neerlandica."},{"issue":"2","key":"pone.0332627.ref009","first-page":"265","article-title":"Modelling association football scores and inefficiencies in the football betting market","volume":"46","author":"MJ Dixon","year":"1997","journal-title":"Journal of the Royal Statistical Society: Series C (Applied Statistics)."},{"issue":"4","key":"pone.0332627.ref010","doi-asserted-by":"crossref","first-page":"523","DOI":"10.2307\/2348900","article-title":"Modelling paired comparison data with large numbers of draws and large variability of draw percentages among players","volume":"44","author":"AYC Kuk","year":"1995","journal-title":"The Statistician."},{"issue":"9","key":"pone.0332627.ref011","doi-asserted-by":"crossref","first-page":"1561","DOI":"10.1080\/02664763.2017.1383370","article-title":"Analysis of the importance of on-field covariates in the German Bundesliga","volume":"45","author":"G Schauberger","year":"2017","journal-title":"Journal of Applied Statistics."},{"issue":"1","key":"pone.0332627.ref012","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1111\/j.1467-9876.2012.01046.x","article-title":"Dynamic Bradley\u2013Terry modelling of sports tournaments","volume":"62","author":"M Cattelan","year":"2012","journal-title":"Journal of the Royal Statistical Society Series C: Applied Statistics."},{"issue":"4","key":"pone.0332627.ref013","doi-asserted-by":"crossref","first-page":"221","DOI":"10.2165\/00007256-199928040-00001","article-title":"Home advantage in sport: an overview of studies on the advantage of playing at home","volume":"28","author":"AM Nevill","year":"1999","journal-title":"Sports Med."},{"key":"pone.0332627.ref014","doi-asserted-by":"crossref","unstructured":"S\u00e1nchez R, Garc\u00eda-de-Alcaraz A. Crowd effects, territoriality and home advantage: a sociological explanation. Home Advantage in Sport. Routledge. 2021. p. 51\u201363.","DOI":"10.4324\/9781003081456-7"},{"issue":"4","key":"pone.0332627.ref015","article-title":"Team quality and game location effects in English professional soccer","volume":"26","author":"SR Bray","year":"2003","journal-title":"Journal of Sport Behavior."},{"key":"pone.0332627.ref016","doi-asserted-by":"crossref","unstructured":"Pollard R. Home advantage in football: a current review of an unsolved puzzle. 2008.","DOI":"10.2174\/1875399X00801010012"},{"issue":"4","key":"pone.0332627.ref017","doi-asserted-by":"crossref","first-page":"221","DOI":"10.2165\/00007256-199928040-00001","article-title":"Home advantage in sport: an overview of studies on the advantage of playing at home","volume":"28","author":"AM Nevill","year":"1999","journal-title":"Sports Med."},{"issue":"4","key":"pone.0332627.ref018","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1515\/jqas-2018-0060","article-title":"A hybrid random forest to predict soccer matches in international tournaments","volume":"15","author":"A Groll","year":"2019","journal-title":"Journal of Quantitative Analysis in Sports."},{"key":"pone.0332627.ref019","article-title":"Hybrid machine learning forecasts for the UEFA EURO 2020","author":"A Groll","year":"2021","journal-title":"arXiv preprint."},{"key":"pone.0332627.ref020","doi-asserted-by":"crossref","first-page":"460","DOI":"10.1177\/1471082X18799934","article-title":"Predicting matches in international football tournaments with random forests","volume":"18","author":"G Schauberger","year":"2018","journal-title":"Statistical Modelling."},{"issue":"10","key":"pone.0332627.ref021","doi-asserted-by":"crossref","first-page":"7541","DOI":"10.1007\/s10994-024-06608-w","article-title":"Evaluating soccer match prediction models: a deep learning approach and feature optimization for gradient-boosted trees","volume":"113","author":"C Yeung","year":"2024","journal-title":"Machine Learning."},{"issue":"1","key":"pone.0332627.ref022","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1515\/jqas-2012-0036","article-title":"Determining the level of ability of football teams by dynamic ratings based on the relative discrepancies in scores between adversaries","volume":"9","author":"AC Constantinou","year":"2013","journal-title":"Journal of Quantitative Analysis in Sports."},{"issue":"4","key":"pone.0332627.ref023","doi-asserted-by":"crossref","first-page":"1899","DOI":"10.1007\/s00180-024-01585-z","article-title":"Alternative ranking measures to predict international football results","volume":"40","author":"R Macr\u00ec Demartino","year":"2024","journal-title":"Comput Stat."},{"key":"pone.0332627.ref024","article-title":"TrueSkill: a Bayesian skill rating system","volume":"19","author":"R Herbrich","year":"2006","journal-title":"Advances in neural information processing systems."},{"issue":"4","key":"pone.0332627.ref025","doi-asserted-by":"crossref","first-page":"231","DOI":"10.3233\/JSA-200619","article-title":"FIFA ranking: evaluation and path forward","volume":"8","author":"L Szczecinski","year":"2022","journal-title":"Journal of Sports Analytics."},{"key":"pone.0332627.ref026","unstructured":"Honda M. Elo vs. Bradley-Terry: Which is Better for Comparing the Performance of LLMs? Hippocampus\u2019s Garden Blog. 2024. https:\/\/hippocampus-garden.com\/elo_vs_bt\/"},{"issue":"329","key":"pone.0332627.ref027","doi-asserted-by":"crossref","first-page":"317","DOI":"10.1080\/01621459.1970.10481082","article-title":"On extending the Bradley-Terry model to accommodate ties in paired comparison experiments","volume":"65","author":"RR Davidson","year":"1970","journal-title":"Journal of the American Statistical Association."},{"key":"pone.0332627.ref028","first-page":"324","article-title":"Rank analysis of incomplete block designs: I. The method of paired comparisons","volume":"39","author":"RA Bradley","year":"1952","journal-title":"Biometrika."},{"key":"pone.0332627.ref029","unstructured":"Sky Sports. History\u2019s top home team is revealed. https:\/\/www.skysports.com\/football\/news\/11661\/9927450\/historys-top-home-team-is"},{"issue":"12","key":"pone.0332627.ref030","doi-asserted-by":"crossref","first-page":"573","DOI":"10.3390\/jrfm14120573","article-title":"Fans\u2019 perceptions towards video assistant referee (VAR) in the English Premier League","volume":"14","author":"T Hamsund","year":"2021","journal-title":"Journal of Risk and Financial Management."},{"issue":"1","key":"pone.0332627.ref031","doi-asserted-by":"crossref","first-page":"14","DOI":"10.1007\/s12283-024-00459-3","article-title":"The video assistant referee in football","volume":"27","author":"JA Teixeira da Silva","year":"2024","journal-title":"Sports Engineering."},{"key":"pone.0332627.ref032","unstructured":"James J. Our 2021 \/22 season in numbers. Arsenal.com (Club Feature Article). 2022. https:\/\/www.arsenal.com\/premier-league-stats-review-emirates-stadium-attendance-goals-appearances"},{"key":"pone.0332627.ref033","unstructured":"James J. Games, goals and records: 2022 \/23 in numbers. Arsenal.com (Club Feature Article) . 2023. https:\/\/www.arsenal.com\/news\/games-goals-and-records-202223-numbers"},{"key":"pone.0332627.ref034","doi-asserted-by":"crossref","unstructured":"McGuigan M. Monitoring training and performance in athletes. Human Kinetics; 2017.","DOI":"10.5040\/9781492595618"},{"key":"pone.0332627.ref035","unstructured":"Sky Sports. Premier League average attendances by club 2023 . [cited 2023 Oct 1]. https:\/\/www.skysports.com\/football\/news\/11095\/12896864\/future-of-football-attendances-on-the-rise-but-how-big-could-stadiums-actually-get"}],"container-title":["PLOS One"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0332627","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T17:27:09Z","timestamp":1759944429000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0332627"}},"subtitle":[],"editor":[{"given":"Florian","family":"Follert","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2025,10,8]]},"references-count":35,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2025,10,8]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0332627","relation":{},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,10,8]]}}}