Which of the following is NOT a type of small-sided game relevant to grassroots refereeing?

The correct answer indicates that tournament play in professional leagues does not classify as a small-sided game relevant to grassroots refereeing. Small-sided games typically involve fewer players than the traditional full-size 11v11 format, enabling a focus on skill development, teamwork, and increased participation.

In grassroots contexts, formats like 5v5 and 7v7 competitions are designed to be more accessible and manageable, particularly for younger or less experienced players. These variations allow for more frequent touches on the ball, more action, and greater opportunities for players to develop their skills in a less formal, supportive environment. Tournament play in professional leagues, which involves a full 11v11 format, is aimed at high-level competition and does not align with the principles of grassroots participation or development. Thus, it is not considered a small-sided game.