This study investigated to elucidate the occurrence aspects of sent off and temporary suspension in men`s sevens rugby, examine the correlation between numerical imbalances and the impact on game performance, and to derive strategic insights for tactical planning during those periods. A comprehensive analysis of eleven tournaments within the 2022-23 World Rugby Sevens Series yielded several key findings: 1) The incidence of sent off and temporary suspension was approximately one in every three matches (0.36 occurrences per match), with a notably high frequency in the latter half of the match, specifically after 3 minutes and 30 seconds (35.1%), and predominantly in teams with a lead of 14 points or greater (16.0%).; 2) In over 60% of matches featuring a temporary suspension, the team with a numerical advantage succeeded in scoring at least one additional try. There was a marked increase in tries resulting from kick-offs, scrums, and tap kicks. The percentage of winning kick-offs and the subsequent try-scoring rate surged by over 40% due to the decreased number of opposing players. A significant elevation in the tackle success rate to 60% was also observed.; 3) Conversely, in approximately 30% of matches, the team at a numerical disadvantage during a temporary suspension struggled to generate offensive plays. A decline in the frequency of line breaks during offensive phases and an escalation in line breaks conceded during defensive phases were also noted, attributable to the reduced number of players on the disadvantaged team. The findings of this research highlight aspects that are distinctly influenced by numerical imbalances. Given that a team with fewer players during a temporary suspension faces comprehensive disadvantages in both offensive and defensive capacities, it is imperative to select strategies that minimise playtime during such suspension, considering the score margin and time remaining in the match. Moreover, the investigation has elucidated specific benefits for the team with a numerical advantage during a temporary suspension, offering invaluable insights for the formulation of tactical approaches in anticipation of numerical imbalances.
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