The Anatomy of Exclusion: Tennis’s New Sex Test Policy

The Women’s Tennis Association (WTA) has introduced a mandatory genetic test for all players, sparking debate about fairness and inclusion in sports. World number one women’s tennis player Alikirina Sabalenka supports the policy, citing her belief that biological men have an unfair advantage over women.

Sabalenka’s endorsement carries significant weight due to her impressive track record as the best female tennis player in the world. However, her views raise complex questions about what constitutes a “fair” competition. While she suggests genetic testing can help maintain fairness in the tour, her perspective relies on a simplistic understanding of what it means to be male or female.

The WTA’s policy is part of a broader trend in sports to introduce sex testing measures. The International Olympic Committee (IOC) updated its guidelines in 2026, and World Boxing and World Athletics have implemented similar policies. These measures rely on genetic markers like the SRY gene, which determines biological sex, and assume that an athlete’s eligibility for competition can be determined by these markers.

The controversy surrounding trans athletes often frames allowing them to compete against cisgender women as a zero-sum game, where their inclusion somehow diminishes cisgender women’s chances of winning. However, this narrative ignores the complexities of human biology and identity. Intersex individuals, for example, may have variations in their sex chromosomes that don’t fit neatly into binary categories.

The introduction of genetic testing raises questions about who gets to define what it means to be a woman or man. The WTA’s policy assumes that genetic markers can determine an athlete’s eligibility for competition, but this overlooks the fact that many people don’t fit neatly into these categories. Furthermore, using genetic testing as a proxy for sex reinforces outdated stereotypes about women’s biology and athletic potential.

Former high-profile athletes like Riley Gaines and Sophie Cunningham have spoken out against trans inclusion in female sports, often relying on simplistic and misleading narratives about trans women’s athletic abilities. Their voices may carry weight among certain segments of the public, but they frequently ignore the complexities of human experience.

Maria Jose Martinez-Patino, a Spanish former hurdler who underwent gender verification in the 1980s, has criticized the WTA’s policy as a setback for progress made in recent decades. Her comments highlight the need for nuance and context in discussions around sex testing.

Rather than relying on simplistic binary categories or assuming that genetic markers can determine an athlete’s eligibility, sports organizations should focus on creating inclusive environments that recognize the diversity of human experience. As the WTA implements its new policy, individual players will face a decision: whether to support what they see as a fair measure or push back against what they consider exclusionary.

The debate surrounding sex testing is far from over, and it’s time for sports organizations to take a more nuanced approach that prioritizes inclusion and fairness above all else. The consequences of these policies extend beyond the tennis world, threatening to create a culture where individual athletes are defined by their genetic markers rather than their skills or achievements. It’s time to reconsider what we mean by “fairness” in competition and create spaces that truly value diversity and inclusion.