| Abbreviation | Definition |
|---|---|
| ATP | Association of Tennis Professionals |
| ATR | Australian Tournament Rankings |
| ATS | Austen Tennis Superiority |
| ATTA | Atlanta Team Tennis Association |
| ATTF | African Table Tennis Federation |
| ATTU | Asian Table Tennis Union |
| ATVD | Algemene Tennis Vereniging Diemen |
| BATA | Barrington Area Tennis Association |
| BCTA | Brunswick County Tennis Association |
| BCTA | Bucks County Tennis Association |
| BDTA | Berwick District Tennis Association |
| BESR | Ball Exit Speed Ratio |
| BETC | Boeing Employees Tennis Club |
| BFT | Baltimore Fitness and Tennis |
| BLTA | Bahamas Lawn Tennis Association |
| BLTA | Bermuda Lawn Tennis Association |
| BLTA | Biggest Little Tennis Association |
| BLTB | Bonaire Lawn Tennis Bond |
| BMTA | Bismarck Mandan Tennis Association |
| BSTC | Broomfield Swim and Tennis Club |