The letter is the latest missive in an enormous spat that has drawn in tennis players past and present from the highest levels of the game – all sparked by a letter Australian tennis legend Court wrote to a newspaper about same-sex marriage.



Navratilova penned the letter to the Margaret Court Arena itself and it was published by Fairfax Media on Thursday.



"Her vitriol is not just an opinion. She is actively trying to keep LGBT people from getting equal rights (note to Court: we are human beings, too). She is demonising trans kids and trans adults everywhere."

So – hang on. How did we get here?

Well, just over a week ago, 24-time Grand Slam champion Margaret Court wrote a letter to The West Australian newspaper saying she would boycott Qantas over the airline's support for same-sex marriage.