Serena Williams will only return to professional tennis if she feels capable of matching her pre-pregnancy level of play.
The American, winner of 23 Grand Slams, is currently out of the game, expecting a baby with fiancé Alexis Ohanian in under a month.
"In this game you can go dark fast," she told Vogue. "If I lose, and I lose again, it’s like, she’s done. Especially since I’m not 20 years old. I’ll tell you this much: I won’t win less. Either I win, or I don’t play.”
The 35-year-old last took to the court back in January, when she won the Australian Open in Melbourne. She retains plans of returning at the same event early in 2018.
"It’s the most outrageous plan," she admits. "I just want to put that out there. That’s, like, three months after I give birth. I’m not walking anything back, but I’m just saying it’s pretty intense."
In the full interview, Serena also revealed how the couple have differing views on the likely sex of the baby.
"Alexis thinks we’re having a boy, but I have a strong suspicion that it’s a girl. Two weeks after we found out, I played the Australian Open. I told Alexis it has to be a girl because there I was playing in 100-degree weather, and that baby never gave me any trouble. Ride or die. Women are tough that way."