Former tennis legend, Martina Navratilova, now understands just how ‘nasty’ those who champion identity politics can actually be. The whole controversy erupted late last year when Navratilova wrote the following tweet, but was then quickly forced to apologise and subsequently delete it.

But now, in a well-written article, re-published in The Australian this week, Navratilova persuasively and articulately argues why it is unfair for biological men to compete against women in professional sport.