There is a growing need for live feedback on the field, so the speed and accuracy of information provided by computer analysis is crucial for planning further procedures in the game, and later processing and possible application for planning and programming training and matches (Sarmento et al., 2018). This idea was the guiding thought of this paper, which aims to show the impact of defensive actions (repossession: 1/3, 2/3, 3/3, percentage of duels won, percentage of defensive duels won, percentage of air duels won, percentage of sliding tackles won, interceptions, clearances and allowed number of passes to the opponent before taking the ball) on the outcome of the football match (win, draw, defeat), and their impact on the number of goals conceded. Data were provided by the Football Academy "GNK Dinamo Zagreb" for the categories U19 (33 games) and U18 (30 games) from year 2021., which includes the second half of the season 2020/2021 and the first half of the season 2021/2022. With the help of Pearson's correlation coefficient, the statistical significance of a certain variable and its influence on the outcome of a football match was sought. The results showed a statistically significant correlation between the outcome of the match and the number of repossessions 1/3 (r = -0.311, p <0.05) and the number of repossessions 3/3 (r = 0.269, p <0.05), and the relationship between the percentage of sliding tackles won with the outcome of the match (r = -0.249, p <0.05). The number of repossessions in 1/3 (r = 0.262, p <0.05) and in 3/3 (r = -0.362, p <0.05) also statistically significantly affects the number of conceded goals, and the most interesting fact is that PPDA (r=0.261, p <0.05) affects the number of conceded goals. Data from the Wyscout platform, which provides video analysis data processing services, and the Statistica 13.0 data processing program were used for this work.