The present study wishes to analyse and compare frequency of tactical behaviour by football players of U-13 and U-15 category. 1.145 and 1.304 actions were accomplished by, respectively, to the U-13 and U-15 players. The evaluation instrument used was FUT-SAT to analysed tactical actions. Was used SPSS software for Windows(r), 19.0 version, to the descriptive analysis, comparative frequency and perceptual of tactical actions. To U-13 level the results shows a bigger frequency to tactical actions by offensive principles "Mobilit" and "Offensive Unit" and defensively, "Defensive Unit" and "Contention". Offensively at U-15 category were preponderant the difference of tactical principles "Space" and "Offensive Coverage" and defensively "Defensive Unit" and "Contention". In both categories was seen that the teams practiced a more static offensive game guided by passes, and defensively, they hold more an individual game, in an unorganized and low block.
Soccer; Tactical behavior; Assessment