Tennis player Martina Navratilova criticized trans swimmer Lia Thomas after her attack on feminism. She did so following comments that Thomas had previously made in which the transgender woman claimed that she did not feel supported by women. Many of them did not look favorably on Thomas competing in women's competitions. Faced with this, Navratilova sent a tweet in which she assured that Thomas should not give an opinion on these matters:

This is not the first time Navratilova has spoken out about the controversy that is simmering in the sport today. Trans athletes' participation in competitions of a gender other than their biological sex is controversial in the United States. The Czech-American tennis player has always been against it.

She stated this in an opinion piece published in the London Times three years ago, where she said it was "insane and cheating" to allow transgender people to compete in sports tournaments of a gender other than their biological gender:

She asserted that despite these people reducing their "hormone levels," this would not solve the problem and that it was simply unfair for transgender women to participate in sports competitions as the physical conditions are not the same: