Miami HeraldGrand Slam Titles: 1; Serena Williams announces baby's birthMiami HeraldGo ahead and add another title to Serena Williams' collection: Mom. The tennis star announced via social media on Wednesday that she gave birth to a girl named Alexis Olympia Ohanian Jr. Williams posted about her baby on Instagram and Twitter accounts ...Serena Williams Shares Photo of Daughter Alexis on InstagramBleacher ReportMeet Her Baby Girl!