A hidden benefit of incomplete round-robin tournaments: Encouraging offensive play

Fuente: arXiv
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Main Author: Csató, László
Format: Preprint
Published: 2025
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author Csató, László
author_facet Csató, László
contents This paper aims to explore the impact of tournament design on the incentives of the contestants. We develop a simulation framework to quantify the potential gain and loss from attacking based on changes in the probability of reaching the critical ranking thresholds. The model is applied to investigate the 2024/25 UEFA Champions League reform. The novel incomplete round-robin league phase is found to create more powerful incentives for offensive play than the previous group stage, with an average increase of 119\% (58\%) regarding the first (second) prize. Our study provides the first demonstration that the tournament format itself can strongly influence team behaviour in sports.
format Preprint
id arxiv_https___arxiv_org_abs_2509_13141
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A hidden benefit of incomplete round-robin tournaments: Encouraging offensive play
Csató, László
General Economics
Economics
Physics and Society
Applications
62P20, 90-10, 90B90
This paper aims to explore the impact of tournament design on the incentives of the contestants. We develop a simulation framework to quantify the potential gain and loss from attacking based on changes in the probability of reaching the critical ranking thresholds. The model is applied to investigate the 2024/25 UEFA Champions League reform. The novel incomplete round-robin league phase is found to create more powerful incentives for offensive play than the previous group stage, with an average increase of 119\% (58\%) regarding the first (second) prize. Our study provides the first demonstration that the tournament format itself can strongly influence team behaviour in sports.
title A hidden benefit of incomplete round-robin tournaments: Encouraging offensive play
topic General Economics
Economics
Physics and Society
Applications
62P20, 90-10, 90B90
url https://arxiv.org/abs/2509.13141