♪ Man: 1, 2, 3, 4!

[Rock music playing] ♪ Narrator: Twelve years earlier, at 21 years old, Martina Navratilova's singles career had yet to take off.

Having left Czechoslovakia to break into the tennis elite, she had landed at a time when the women's game was booming.

Woman: In the late seventies, women's tennis was already established as the most powerful, most prominent women's professional sports in the world.

Narrator: Billie Jean King had transformed women's tennis, but, with her fame fading, a feisty new trailblazer had arrived on the scene.

Navratilova: I was brash, I play a very aggressive style of tennis.

I was the bad guy, right?

[Applause] Announcer: There's despair on the face of Martina.

She knows she didn't do too well there.

Navratilova: I wore my emotions on my sleeve... Announcer: An angry Martina Navratilova there.

and I would complain about line calls.

I quit trying after she made that noise.

Navratilova, voice-over: The Brits, we don't do that, right?

James Mason: I personally always feel slightly sick when I see one of the professionals disputing a line call.

Announcer: Martina Navratilova, and I'm afraid we've had rather too many of the disputes in this match.

He said, "You're so competitive" as if it's a bad thing.

Are you supposed to, like, be demure and blend in?

You know, **** that.

Ha ha ha!