Problem Statement: Soccer players may behave differently in competition depending on various characteristics of the environment around them, as well as the possible strengths and limitations of internal characteristics. In addition, there are some studies about the physical demands according to the results (winners vs. losers). Approach: Knowledge of contextual factors such as imbalance in decision making and physical behavior in soccer competition. Purpose: The aims of this study were to know the effect of contextual variables (match location, field dimensions, opponent level, and match outcome) on the physical performance of semi-professional soccer players and, to know the interaction between these factors to achieve sports success. Methods: One hundred forty events in Spanish male semi-professional soccer players during the 2021-2022 season were analysed. WIMU devices (SportTrack®) of 18 Hz. and SPRO software were used. T-test, one-way ANOVA, Chi-square, and logistic regression tests were performed. Results: A greater physical performance was shown when the team played at home and in large fields. Regarding the match outcome, players covered higher total distance and walking distance when they won (p < .05). In addition, the sports success in the competition was associated with the field dimensions and the opponent level (x2 [2, n=105] = 16.737, p = .000, x2 (2, n=96) = 8.304, p = .016; respectively). Conclusions: Contextual factors influenced the physical performance of semi-professional players in official competition. Field dimensions and opponent level affected the sports success in competition. This study has shown relevant information for the technical staff of the semi-professional soccer teams in order to propose new keys and ways of planning training sessions
