The study investigated the effect of coaches’ intervention strategies on the technical-tactical performance dynamics of football teams in small-sided games (SSG). The study involved three coaches (A, B, C) and 16 Under-17 players. Each coach was asked to select a tactical content related to the operational principles of the offensive phase and to design a SSG to emphasize it. During the training session, each coach was asked to apply this SSG under four different conditions: Condition 01 (No Intervention); Condition 02 (Verbal Intervention); Condition 03 (Game Intervention); Condition 04 (Free Intervention). The technical-tactical performance was evaluated through notational analysis and positional variables. Regarding the Coach A's intervention, it was interesting to note that none of the interventions used were capable of better stimulating the intended tactical training content, meaning it's also important to consider that in certain situations, there's no need for intervention. For Coach B, the use of intervention strategies based on manipulation of key tasks constraints was more efficient. Regarding the Coach C's intervention, strategies of verbal communication and manipulation of key tasks constraints were both effective. Coaches need to develop their pedagogical sensitivity in order to adjust their intervention strategies to their professional context.
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