Context: A number of players may be replaced by substitutes during the course of the game. The maximum number of substitutions permitted in most competitive international and domestic league games is three, though the permitted number may vary in other competitions or in friendly matches. Common reasons for a substitution include injury, tiredness, ineffectiveness, a tactical switch, or timewasting at the end of a finely poised game. In standard adult matches, a player who has been substituted may not take further part in a match. IFAB recommends "that a match should not continue if there are fewer than seven players in either team." Any decision regarding points awarded for abandoned games is left to the individual football associations.

Question: What is one who replaces a player during a game called?
Answer: substitutes

Question: What is the maximum number of substitutions during most professional games?
Answer: three

Question: Who decides on who's rewarded points for abandoned games?
Answer: individual football associations

Question: What is one who injures a player during a game called?
Answer: Unanswerable

Question: What is the minimum number of substitutions during most professional games?
Answer: Unanswerable

Question: Who decides on who's rewarded points for completed games?
Answer: Unanswerable

Question: Who can not be replaced during the course of the game?
Answer: Unanswerable