Martina Navratilova and Chris Evert had a 15-year rivalry in women's tennis, but now they're opening up about their friendship in a new documentary.

What happened?

The two tennis icons joined "Good Morning America" to discuss their rollercoaster relationship and the documentary, "Chris & Martina: The Final Set".

Evert said their rivalry was intense and competitive, but they became good friends toward the end.

Why it matters for Martina Navratilova

Navratilova announced she had been diagnosed with breast cancer in 2010, but was deemed cancer-free six months later, and in 2023, she revealed she had been diagnosed with both throat and breast cancer.

Evert was diagnosed with ovarian cancer in 2022 and announced she was cancer-free the following year.

What comes next?

The documentary, directed by Rebecca Gitlitz, premiered at the Tribeca Film Festival and will be available to stream on Netflix on June 26.

Navratilova and Evert want to raise awareness about cancer and show that enemies can become friends.

The film traces the full arc of their relationship from fierce opponents to lifelong friends and supporters.

Navratilova and Evert's bond deepened off the court after they retired in 1989.

They practiced and traveled together, and their dynamic became complicated when Navratilova started beating Evert.

Evert recalled they were ranked first and second in the world while playing doubles together.

The pair's friendship was strengthened by their shared experiences with cancer.

Navratilova wrote on social media in June 2023 that she was cancer-free.

Evert received a second diagnosis just under a year after her first, but announced she was cancer-free again in July 2024.

The documentary reveals how a rivalry, respect, and resilience shaped one of the most influential partnerships in sports.

Navratilova and Evert's story is one of friendship and support, both on and off the court.