Martina Navratilova and John McEnroe protest Margaret Court Arena

Martina Navratilova and John McEnroe are joining forces to protest Margaret Court Arena.

The two tennis legends paraded a banner around Margaret Court Arena Tuesday urging Tennis Australia to rename the venue. The banner simply read, “Evonne Goolagong Arena,” in honor of the indigenous Australian who won seven Grand Slam singles titles.

Navratilova and McEnroe have long criticized Court for her fervent anti-LGBTQ views. Court is one of the all-time great women’s tennis players, becoming the first woman in the era of modern pro tennis to sweep the Australian Open, French Open, Wimbledon and the U.S. Open in the same calendar year. But she frequently makes homophobic and anti-trans remarks, including in her role as a Pentecostal Christian pastor.

Court has likened gay-rights activists to Adolf Hitler, campaigned against same-sex marriage in her native Australia, and most recently, said transgender children are the work of “the devil.”

In 1990, Court said Navratilova couldn’t be a role model for children, because she is gay.

In an interview with BBC, Navratilova, who boycotted an event honoring the 50th anniversary of Court’s 1970 Grand Slam sweep, said she decided it was time for forceful action.

“I thought Tennis Australia would do something — or the government of Victoria, as apparently they are the ones that make the decision — but nothing has happened,” she said. “And Margaret keeps doubling down in basically attacking the gay and lesbian community.”

Tennis Australia opted to hold a muted celebration for Court this year at the Australian Open, but still honored the anniversary of her historic on-court accomplishment. The organization condemned Navratilova and McEnroe’s protest.

“We embrace diversity, inclusion and the right for people to have a view, as well as their right to voice that view,” Tennis Australia’s statement reads, via BBC. “But the Australian Open has regulations and protocols with respect to how any fan, player or guest can use our facility, the event and the global stage it provides. This is to ensure the integrity of our event.”

In an open letter, which was published Monday, Navratilova says Court’s prejudice against LGBTQ people should disqualify her from being honored with the name of an arena.

“Nobody disputes (Court’s) achievements on the tennis court, and her place in the sport’s history remains as distinguished as it gets,” Navratilova writes, via Tennis.com. “Nobody wants to take away or diminish her career, least of all me. Margaret, Billie Jean and Rod were my childhood heroes. I wanted to be like them.”

This is Navratilova’s second public letter about renaming Margaret Court Arena in recent years. Her first message said Court is a “racist” and “homophobe.”

On Monday, McEnroe also urged Tennis Australia to stop honoring Court in a TV interview.

Navratilova recommends renaming “Margaret Court Arena” to “Evonne Goolagong Arena,” in honor of her on-court success and advocacy work, including among Indigenous Australians.

“Yes, we have free speech in a democracy, but that doesn’t mean that free speech doesn’t have consequences,” Navratilova writes. “When Margaret goes out of her way to single out a group of people and tell them they don’t deserve equal rights, that they are less than good parents, that they are not godly, that’s not merely free speech. It’s hateful and hurtful speech and it’s injurious to countless vulnerable people.

“Why not pick someone whom every child can look up to and want to emulate—a champion who inspires and motivates young and old to do their best and be their best every day?”