Tennis, doping and corruption: ITIA cases 2025

DThe International Tennis Integrity Agency (ITIA) is the regulatory authority for professional tennis. It was founded in 2008 by the sport’s leading institutions: the four Grand Slam tournaments in Melbourne, Paris, Wimbledon and New York as well as the men’s tour (ATP), the women’s tour (WTA) and the International Tennis Federation (ITF). Until 2020 it was called the Tennis Integrity Unit. The CEO is the Englishwoman Karen Moorhouse, who previously worked for the Rugby Football League in Great Britain for 14 years. The organization, based in London, ensures that players do not break any anti-doping or other competition rules. If necessary, the ITIA will impose penalties. This is how the doping case of world number one Jannik Sinner from South Tyrol ended up at the ITIA last year: two positive tests for Clostebol. In the end, Sinner agreed with the World Anti-Doping Agency Wada on a mini-ban. Sinner was the most prominent case – but offenses are noticeably often committed by professionals from the lower reaches of the world rankings. A look at the files shows what abysses have opened up in tennis in 2025 alone. And that’s just a selection.