Female tennis player makes claim about rivals’ ‘higher testosterone levels’ The IndependentTestosterone levels mean Sabalenka and Swiatek are better than me, says world No 27 The TelegraphMarta Kostyuk claims Aryna Sabalenka and Iga Swiatek’s ‘testosterone levels’ make them better The IndependentMarta Kostyuk: Aryna Sabalenka and Iga Swiatek have ‘higher testosterone’ The Times
