Umpires

Officials cover more than 760 matches during The Championships

• There are 149 officials at The Championships working as Chair Umpires (40) and Match Assistants (64), off-court staff (10) and review officials (36). These officials cover more than 764 matches played during the Fortnight across 18 courts.
• The majority of officials are British, all members of ABTO (Association of British Tennis Officials) and 80 overseas officials from all over the world, including the team of 7 ITF/Grand Slam Chair Umpires that officiate at all four Grand Slams.
• 40 chair umpires are assigned each day, with the other officials working as Match Assistants. Chair Umpires normally umpire two matches a day, although not necessarily on the same court. Match Assistants work in teams and there are generally four officials assigned to each show court (Centre Court, No. 1, 2 and 3 courts and Courts 12 and 18), and two each for the remaining 12 courts. These teams work on a timed rotation (60 minutes on, 60 minutes off).
• The Chief Umpire, Andrew Wynne, is responsible for the organisation of all on-court officiating at The Championships. His role is to assign, supervise and evaluate all of the officials each day. A custom-made computer system and a team of assistants help this process.
• Chair Umpires use tablet computers to score the match, with each point scored being displayed automatically on the scoreboards and wimbledon.com.
• The live Electronic Line Calling system is used on all courts. Players are not able to challenge the calls made by the electronic system, but are able to request a replay of a particular shot for review purposes only.