What is can a player change?

his/her position during a match?

Yes, a player can change his/her position during a match. However, it depends on the sport and the rules governing the sport. In some sports, such as football or soccer, the players have designated positions that they must play throughout the game, and it is not allowed to switch positions during the match.

In other sports, such as basketball, players can change their positions within the team, as long as they follow the rules governing the positions. For example, a center cannot simply switch to point guard, as that would violate the team's offensive and defensive strategies.

In some cases, the coach may also choose to switch a player's position during the game based on their performance or the needs of the team. This can be a strategic move to improve the team's performance or exploit the weaknesses of the opposing team.