Official (tennis)

The second, the white badge, is divided into three categories (chair, chief, and referee) but remains only a national certification.

The following three, bronze (chair umpire only), silver, and gold badge are considered international certifications.

These international officials are those seen at the highest levels of play like the Grand Slams, ATP and WTA Tours, and the Fed and Davis Cups.

At the conclusion of a point, game, or set, the chair umpire times the players to ensure they follow ITF regulations on pace of play.

Center service line umpires are responsible for calling foot faults when the server steps over the imaginary extension of the centerline.

At the 2021 Australian Open, all matches used electronic line judges for the first time in a Grand Slam event.

[8][9] The referee "is the official who is responsible for assuring that the competition is fair and played under the ITF Rules of Tennis."

The referee supervises all of the aspects of play at a tournament including the conduct of players, coaches, spectators, and administrative crew.

This process has been made much easier in recent years with the introduction of computer programs that complete draw sheets and schedules based on online player entries and court availability.

Australian chair umpire Scott Ray positions himself prior to a match at Wimbledon [ 1 ]
A chair umpire checks the mark of the ball on clay.
A line umpire stands at a ready position, focusing on his assigned line.