The Women’s Tennis Association will require all players to undergo a one-time genetic test for the SRY gene from 21 July, a policy shift that closes the door on the previous testosterone-based eligibility pathway. A negative result grants immediate access to WTA tournaments; a positive finding triggers further medical assessment before any clearance. The association described the move as designed to “maintain fair competition”, and the new rulebook warns that refusal to test may bring disciplinary sanctions. The decision, viewed from London, aligns tennis with a growing cohort of international federations.

That alignment was reinforced from Washington, where the US Supreme Court delivered a unanimous judgment declaring that state laws in Idaho and West Virginia barring biological males from female school sports do not violate federal civil rights statutes. Justice Kavanaugh’s opinion held that “sex” in Title IX must be read in its ordinary 1970s meaning—biological sex—and that inherent physical differences justify separate teams. The ruling effectively ends the legal challenges brought by two transgender students, and according to analysts in Madrid, it provides a robust judicial underpinning for sex-based eligibility rules across American education.

The WTA’s announcement and the Supreme Court’s decision arrive amid a broader institutional realignment. World Athletics, World Aquatics, the UCI, and World Boxing have already adopted genetic or hormonal criteria, and the International Olympic Committee plans SRY testing for the 2028 Los Angeles Games. In Paris, the case of boxer Imane Khelif—who won women’s gold despite reportedly possessing XY chromosomes—has sharpened questions about competitive integrity and accountability, a theme echoed by five-time Olympian Katie Uhlaender in her criticism of a proposed NCAA antitrust exemption that she argues would shield governing bodies from athlete-led challenges.

Yet the push for biological verification sits uneasily with parallel concerns over privacy and bodily autonomy. In Iran, the recent leak of private images and messages of women in Lorestan, Kermanshah, and West Azerbaijan provinces has triggered a crisis of extortion and social pressure, with reports of several minors taking their own lives. Observers in Tehran note that victims are often blamed rather than supported, exposing a legal and cultural vacuum around privacy protection. Meanwhile, a TIME investigation details how end-to-end encryption on everyday chat apps enables the livestreamed sexual exploitation of children, with nearly half a million Filipino minors affected in 2022 alone—a stark illustration of how technologies designed to shield privacy can also conceal abuse.

For tennis, the immediate consequence is a new eligibility architecture that takes effect this week, with testing to begin in 2026. The WTA says no known transgender women currently compete on its tour, but the rule change pre-empts future disputes and harmonises the sport with the Olympic standard. The next concrete sporting milestone will be the 2026 rollout of testing, which will determine whether any player’s career is interrupted by a positive SRY result.