Serena Williams and the Duchess of Sussex Meghan’s friendship is known to all, and they have exchanged various opinions upon a lot of things. But when it comes to receiving parenting advice for her son Archie Harrison Mountbatten Windsor, Meghan has to look somewhere else.

On BBC Breakfast, 37-year-old tennis pro and the mother of one child, Serena Williams, mocked at her own parenting skills as a "mess." However, it's for her 22-month-old daughter Alexis Olympia to vouch on the statement!

But, in the course of the interview, she unfolds the real reason for not sharing parenting tips with new moms. She strongly believes a new mom already goes through a lot and she will be pleased to be spared from any unsolicited advice. “I never pass on words of wisdom because I feel like everyone—when they have a kid, especially when you just have a baby, it is so difficult just to be," she said.

Williams had offered up a justified piece of parenting advice to the duchess before she welcomed their her first child with Prince Harry, “Accept mistakes and don’t expect to be perfect,” she said with a smile. “We put so much pressure on ourselves.”

Whenever Meghan needed, Serena has been there with her advice all during the former’s pregnancy. She was the one to ask her "to stop being so nice" with all the hormonal changes. But, then she can't disagree that Meghan has always been like that.

William strongly feels that motherhood can change a person, and her instincts are the best guides. She said, "Becoming a mom has changed my perspective on a lot of things. It also has changed me in terms of—I want to leave a legacy. I want to be this, you know, positive person for my daughter…Everything I do, I want to do it for my daughter and I never, obviously, had that motivation before.”

In spite of herself being a global adviser to Verizon Media, the parent company of HuffPost, she acknowledges learning her lessons from personal experience after giving birth to her daughter, Alexis Olympia.

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The duo had always stood beside each other. Before Williams became a mother, Markle raved to Vogue on how much she adores and loves her dear friend.

She said, “She will be an amazing mom. The very best, because she is so attuned to balancing strength and sensitivity. Plus, given that she is pretty epic at karaoke, I think she’ll put her signature Serena spin on singing lullabies for the baby. I can’t wait for that!”

The duchess is currently keeping out of the spotlight as she is on maternity leave, but she might make an appearance to watch Williams at Wimbledon.

NEXT: Meghan Markle And Prince Harry Are Bringing Baby Archie Along On Their Tour In Southern Africa