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

AOL.com editors

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