When should the timer begin the 20-second interval for replacing an injured player?

The timer should begin the 20-second interval for replacing an injured player as soon as the game has stopped for the injury. This is crucial because it ensures that the time for the replacement is measured starting from the moment the game is officially paused for the injury. The rationale behind this rule is to maintain the flow of the game and ensure that no unnecessary delays occur.

Timing starts when the game is halted so that the replacement process is standardized and efficient, allowing the team to substitute a player quickly and maintain the pace of the game. If the timer began when the player was injured, it could lead to confusion and inconsistency, as the injury may require time before an official stoppage occurs. Therefore, starting the timer upon the game's stoppage provides clarity and fairness to both teams.