Belgian qualifier Greet Minnen smacked 24 winners and saved all six break points she faced to dispatch the veteran American.
The couple named the baby girl Adira River Ohanian.
The Los Angeles TGL franchise is part of the Ohanian family's growing sport portfolio.
Speaking to the reporters at the star-studded Met Gala, tennis player Serena Williams said that there were "three of us" on the red carpet, revealing her baby bump.
Will Smith plays Richard Williams, Serena's father in the movie.
Serena singled out decorated NFL quarterback Tom Brady's short-lived retirement from American football.
A bona fide fashion tycoon off the court, Serena was named to the board of shopping app Poshmark in 2019, opening her own closet.
Serena most likely dropped the curtain on her historic career at the US Open on Friday.
The WTA Tour will not be the same without Serena. She was a symbol of fighting spirit, pride and strength on the court and her legacy will be tough to match.
Serena Williams bid an emotional goodbye to the US Open with a third-round loss to Ajla Tomljanovic, in what may have been the last singles match of her glittering career.