The objective of the study is to test the reliability of a scale that was designed to measure the complexity of match play within specific contexts of a soccer game. To test the reliability of our scale, five highly qualified and experienced soccer coaches and five low qualified and inexperienced soccer coaches were recruited to participate in this study. To assess the dynamics of the opponent players and how these constraints affected the possessor of the ball, we distinguished among three functional zones of the game. This study finds the tested scale was reliable across applications for both high and low experienced coaches. This finding is meaningful because it indicates that the theoretical basis it can be used to better understand the principles of complex systems' behaviors for the study of team sports. Therefore, the variables used to assess complexity in this scale appear to be appropriate representative parameters for the study of team sports as dynamical systems.