The umpire must:
Know thoroughly all aspects of tennis, the Rules, the Regulations of this tournament, the “Code of Conduct for the Player”, the refereeing procedures and the “Code of Tennis Judges”. The tower judge must fulfill his duties in accordance with established requirements.
Wear clothing similar to other judges on the tower (as directed by the head judge).
Before the match for which he is appointed, make sure that both, for technical means, and serviceability are available:
Manual stopwatch for time control:
warm-ups (usually 5 minutes);
between draws of points (20 sec.);
rest when changing sides (90 sec);
breaks between sets (120 sec.);
other time intervals established by the provisions of the Tennis Rules and Regulations.
Roulettes, for measuring:
the height of the grid in its center (91.4 cm);
grid heights at the edges – near pillars or racks (props) for a single game (107 cm);
the distance between the placed stands for a single game and the outer side of each sideline of a single court (91.4 cm);
other linear dimensions (if necessary), for example, the location of the referee’s tower (the recommended distance is about 0.9 m from the post on which the net is attached) or the removal of chairs for judges on the feed line and on the back line (at least 3.66 m from the sideline of the court).
Radio stations for negotiations with the head judge (if any).
Coin for drawing lots for the choice of serve (reception of serve) and side of the court.
The protocol of the match and the pen for keeping records (at prestigious tournaments a special computer can be used for this purpose).
In advance (before the arrival of the players) come to the court in order to:
inspect the court, inspect the net (for lack of holes) and measure its height in the places provided;
make sure that the line judge and the children are ready to pick up and serve the players;
check the serviceability of the scoreboard and loud-speaking invoice announcement system;
make sure players have chairs, towels and drinks;
make sure that there is an appropriate number of balls per match, including playing balls in case of loss (banks with balls should only be opened before the match).
Directly before the start of the match, meet the players on the court to:
remind the players about the conditions of the match – from how many sets he plays, about the allowed number of video views of the ball’s track by the electronic system, when the balls change (all this may vary in different tournaments), as well as dates and other information of interest to them;
in the presence of two players or pairs, cast lots to determine the pitch and side before the start of the workout.
establish whether each player’s clothing complies with the requirements of the “Code of Conduct for the Player”. Moreover, if the player is invited to change clothes, then no more than 15 minutes are provided for this. Otherwise, the player or couple may be disqualified. The judge on the tower in some cases may be assigned to re-warm up.
Know the correct pronunciation of the names of the players. To do this, when coming to the court players, in a polite form, check with them the correct pronunciation of the name.
Draw lots according to the choice of submission (reception of submission) of the sides of the court before the start of the warm-up. You need to stand facing the referee tower at a distance of 4-5 meters from it.
Keep a match report in accordance with established rules.
Make the first decision on all issues of the Rules that arise during the match, taking into account the right of the player to call the main referee.
Identify all factual issues that arise during the course of the match (including determining decisions along the lines in the absence of line judges).
Ensure that players and referees comply with the rules.
Control the behavior of players, including reassuring players and resolving conflict situations, fines for unsportsmanlike behavior and other violations provided for by the “Code of Conduct for the player” on the court. Make decisions about the tips of the coach.
Ensure compliance with the time limits for side switching and service, as well as the arrangement and order of service in the doubles match.
Make a decision to provide a medical, toilet break or break for changing clothes.
Swap or replace any referees on the line or grid when necessary to improve the work of the refereeing team serving the match. Notify the head judge of the need to replace the line judge in connection with his lack of professionalism or poor health.
Loudly and clearly announce the score after each point draw, in accordance with the established rules.
Repeat the referee’s exclamations on the line or net only when they were made quietly or slurred to prevent misunderstanding on the part of the players.
To cancel the decision of the line judges only in case of obvious error. Cancellation must be done immediately, i.e. immediately after the mistake was made. All cancellation procedures are done only in accordance with established procedures.