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Tennis Great Serena Williams And Alexis Ohanian Welcome Baby Girl

Tennis superstar Serena Williams has a new title -- she's a mommy now after giving birth to a baby girl last Friday. Her coach and the US Open actually made the announcement on Twitter.

And of course, Serena's sister, Venus confirmed it during an interview before her match at the US Open on Friday. When  asked about Serena having a baby girl and her feelings on becoming an aunt. She said, "Obviously I'm super excited, words can't describe."