Serena Williams reveals her daughter's initials stand for 'Aussie Open'

Serena Williams revealed on Thursday that her newborn baby daughter's initials are a nod to baby Alexis Olympia Ohanian Jr.'s first Grand Slam title -- the Australian Open. 

"Fun fact my daughters [sic] initials are AO as in the Aussie open she won with me @AustralianOpen," the tennis superstar tweeted. 

Williams won the Australian Open in January when she was two months pregnant

The 23-time Grand Slam champion and her husband, Reddit co-founder Alexis Ohanian, welcomed their first child on Sept. 1. 

Serena Williams' pregnancy Instagrams

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Serena Williams' pregnancy Instagrams
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Serena Williams' pregnancy Instagrams
@vanityfair
Poster in background....
@vanityfair texture #annielebowitz Must read article. Link in bio
Wimbledon got me like: Easy standing drills this morning. Go easy.
@benstiller stiller Sorry, White. Average Joes for life! And that goes for both of us. Omaze.com/Joe
Must read article. Link in bio
My Mom
Hey everyone! Ok so signature collection is avail on @HSN tonight at 9pm tune in. This dress and more u have to tune in. So excited that I'm dancing!! 💃🏿💃🏿 @serenastatement
Mood lol
Yesterday's board meeting really went well. I am beyond excited to be official in Silicon Valley and be a part of the SurveyMonkey Board. Thanks to Zander, @sherylsandberg and everyone at SurveyMonkey. Diversity. New ideas. Challenge ourselves to be the best. #embracetheanswer
Had the best time at Disney, Pandora was unreal!!#visitpandora
Fun day out and about with @audemarspiguet
Thanks @newyorkpalace for an unforgettable stay. Until next time❤️ #lottenewyorkpalace
Watch: the Diamond outrage by one of my partners @audemarspiguet Dress @donatella_versace @versace_official earrings: @xivkarats overall: LOVE
About date night..
My Dearest Baby, You gave me the strength I didn’t know I had. You taught me the true meaning of serenity and peace. I can't wait to meet you. I can't wait for you to join the players box next year. But most importantly, I am so happy to share being number one in the world with you.... once again today. On @alexisohanian bday. 😉 from the world's oldest number one to the world's youngest number one. -Your Mommy
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