When can a player who has been substituted back into the game after being injured?

The assertion that a player may re-enter the game after notifying the referee but may replace any player highlights the procedure for substitutions, particularly in the case of a player returning from an injury. Soccer rules stipulate that once a player has been substituted out due to an injury, they can be allowed back into the game under certain conditions. Notifying the referee is essential, as it ensures the match officials are aware of the change, maintaining the integrity of the game and the flow of play.

When it comes to which player the injured player can replace, this typically applies to players who are currently on the field in their designated positions. The key point is that the injured player may come back into the match, but the original substitution's integrity must be preserved. The player must not only notify the referee but also ensure they're re-entering correctly, and clarity about the substitution rule in context helps prevent confusion on the field.

The other options do not fully encapsulate the procedural requirements and restrictions when a player is substituted back in after an injury, especially concerning the notification and replacement dynamics on the field.