Mark out a zone of approximately 20x25m with 2 small goals on each width. Outside this playing area, set up a tic-tac-toe grid using cones. Form 2 teams of 5 players and position yourself outside the area with a source of balls by your side.
The exercise starts with a tic-tac-toe (using pinnies or colored cones). Each player must place a pinnie in the square of their choice. The first team to make a line of 3 (vertical, horizontal, or diagonal) will then gain a numerical advantage for the following opposition. As soon as the point is scored, 2 players from the winning team and 1 player from the losing team enter the playing area, resulting in a 2vs1.
When a goal is scored, 1 player from each team enters the field to create a 3vs2. With the next goal, the same process leads to a 4vs3, then 5vs4, and finally ends with a 5vs5 in terms of the final opposition.
Count the number of goals scored for each team to establish a form of competition, then restart with the tic-tac-toe once the 5vs5 is completed.
Note: if the intermediate oppositions (2vs1, 3vs2, etc.) are too long, you can add a time limit and bring in new players even if no team has scored.
The tic-tac-toe game adapted to soccer is a classic, and this variant with opposition is very popular with players!