Eighteen-time Grand Slam champion Martina Navratilova has renewed her call for the Margaret Court Arena to be renamed - describing the Australian as a "racist and a homophobe".
Court, 74, has said she would not fly on Qantas "where possible" in protest at its support of same-sex marriage.
She then told a Christian radio station "tennis is full of lesbians".
In an open letter, Navratilova said: "We should not be celebrating this kind of behaviour."
The 60-year-old addressed her letter to the Margaret Court Arena, one of the main show courts at the Australian Open.