• World No 1 says ‘biological men’ have a ‘huge advantage’

• ‘She hit the nail on the head’, says battle of sexes rival Kyrgios

Aryna Sabalenka has weighed into the participation of transgender athletes in women’s sport, the world No 1 saying it would be unfair for women to face “biological men” in professional tennis.

The WTA Tour gender participation policy permits transgender women to participate if they have declared their gender as female for a minimum of four years, have lowered testosterone levels and agree to testing procedures. These conditions may be further varied by the WTA medical manager on a case-by-case basis.

• World No 1 says ‘biological men’ have a ‘huge advantage’

• ‘She hit the nail on the head’, says battle of sexes rival Kyrgios

Aryna Sabalenka has weighed into the participation of transgender athletes in women’s sport, the world No 1 saying it would be unfair for women to face “biological men” in professional tennis.

The WTA Tour gender participation policy permits transgender women to participate if they have declared their gender as female for a minimum of four years, have lowered testosterone levels and agree to testing procedures. These conditions may be further varied by the WTA medical manager on a case-by-case basis.

• World No 1 says ‘biological men’ have a ‘huge advantage’

• ‘She hit the nail on the head’, says battle of sexes rival Kyrgios

Aryna Sabalenka has weighed into the participation of transgender athletes in women’s sport, the world No 1 saying it would be unfair for women to face “biological men” in professional tennis.

The WTA Tour gender participation policy permits transgender women to participate if they have declared their gender as female for a minimum of four years, have lowered testosterone levels and agree to testing procedures. These conditions may be further varied by the WTA medical manager on a case-by-case basis.