Calling a Team Timeout (TTO) is one of the coaches` most important tools. Given the key competitive advantage to determine your own timing, it is crucial to make a good decision when to use a TTO. Existing research shows that teams can benefit in general from TTOs and that they are called at the end of the game and when trailing (Gomes et al., 2014; Gutiérrez-Aguilar et al., 2016; Prieto et al., 2016). However, to generate relevant findings, situational variables must be included (Fernandez-Navarro et al., 2020; Gómez, Lago-Peñas et al., 2015). By integrating situational variables like scoring streak and player difference and higher-order interactions, this study aims to identify specific game situations where TTOs are most effective. Based on 850 games of the German Handball Bundesliga, game situations are identified by Classification Tree Analysis and efficacies are evaluated. Findings indicate a strong impact of timing. Frequently used TTOs, e.g., at the end of periods, are beneficial to the teams. However, strongest effect occurs for TTOs taken at the early stages of the game and with a positive run. Results indicate that TTO is a powerful tactical tool and an application at uncommon timings may even enhance the success rate.
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