ITF establishes the Tennis Anti-Doping Programme 1993. The Tennis Anti-Doping Programme is adopted by the ITF, ATP and WTA and includes a set of fixed standards that the three main bodies must adhere to as well as a strong educational component. It becomes exclusively managed by the ITF four years later, in 1997.
https://www.itftennis.com/en/about-us/organisation/history-of-the-itf