Are you an idiot?' Culture of umpire abuse in tennis | Tennis | Al Jazeera
Pe | PDF | Referee | Hand
Merlin | Philosophy Referee Hand Signals
At the U.S. Open, that voice yelling 'Out!' comes from a computer | Reuters
Pe | PDF | Referee | Hand
5 best tennis umpires of all time | Chase Your Sport - Sports Social Blog
5,830 Tennis Umpire Photos and Premium High Res Pictures - Getty Images
Tennis fans go wild for Serbian umpire who tipped Nick Kyrgios over the edge | Daily Mail Online
How To Get Started In A Tennis Official Role | LTA
Why Novak Djokovic Was Disqualified From the U.S. Open - The New York Times
Ex-umpire Jake Garner promoted to US Open tournament referee - The San Diego Union-Tribune
Serena Williams serves up dialogue on sexist referee calls – The Inkblot
SOLVED: Since an instant replay system for tennis was introduced major toumament Mem challenged 1390 referee calls with the esult that 429 of the calls were overturned Women challenged 750 referee calls,
Roles of Officials - Tennis Canada
A robot referee can really keep its 'eye' on the ball
Tennis scoring, rules and officials - Tennis - factfile - GCSE Physical Education Revision - Edexcel - BBC Bitesize
8 Umpire Hand Signals You Need to Know - PingSunday
The U.S Open replaces human line judges with optical technology : NPR
Serena Williams calls out sexism in tennis | The Chatterbox
Official (tennis) - Wikipedia
Officials at a tennis match
Worst line calls and umpire decisions in Tennis - YouTube
Tennis player umpire pictogram icon. A set of pictogram representing tennis, player, serve, stroke, ball boy, line judge, | CanStock
Wimbledon umpires banned from calling female players 'Miss' or 'Mrs' – The Sun | The Sun
