Major duties of different officials in a tournament:
- Referee: Prepare draw and schedule of the tournament. Present whenever matches are being played. He/she is the final authority of all ruling questions during the event.
- Chair Umpire: Calls the scores and calls the lines when no Line Umpire is assigned. He/She is the final authority on all questions of fact during match.
- Off Court Umpire: Settle court disputes; overrule players when a clear mistake by player is made.