Serena Williams said she's so busy that she has to schedule time to relax on her calendar

• Serena Williams said she has to schedule herself time to relax.
• She said she is so busy that if she doesn't put "relax" on her calendar, she won't do it.

Even in retirement, Serena Williams doesn't have enough time to unwind.

In an interview with CBS Mornings that aired Wednesday, host Gayle King mentioned a recent tweet from Williams that said, "Allowing myself To relax. ... It's harder than I ever imagined."

"It's so hard for me to relax," Williams told King. "I don't know how to relax."

She continued: "I literally don't. I'm like, I have to schedule it in my schedule," she said, laughing, "And I'm not kidding."

She said if she doesn't schedule "relax" in her calendar, she won't do it.

"I haven't had that in my schedule in a while," Williams admitted. "I need to put it back in there."

—Serena Williams (@serenawilliams) December 28, 2022

Williams has been celebrating her retirement from tennis by working on investing in women from underrepresented groups with her VC fund, Serena Ventures, which she said keeps her busy.

She has also made it clear that she is working on growing her family and is hoping to answer her daughter Olympia's prayers of having a little brother or sister.

—CBS Mornings (@CBSMornings) February 1, 2023