What should a referee do when a clash of heads occurs and play is ongoing?

When a clash of heads occurs during a match, the primary responsibility of the referee is to ensure the safety of the players. Stopping the game to assess the players' conditions is crucial because head injuries can be serious and may require immediate attention. By halting play, the referee can allow medical personnel to evaluate the situation before proceeding, ensuring that any potential injuries are addressed appropriately.

This action aligns with the protocols in place for player safety, as head injuries may not always be immediately obvious. It allows for a thorough assessment to determine whether the players involved are fit to continue playing. Other actions, such as conducting a review of the play or issuing a foul, do not prioritize player safety as effectively in this scenario. Additionally, allowing play to continue until a goal is scored could exacerbate a potential injury and compromise player well-being. Thus, stopping the game is the most responsible course of action for the referee.