Serena Williams gave birth to a 6-pound, 13-ounce baby girl on Friday, ESPN confirmed.

Serena Williams (Photo: Aaron Favila, AP)

Moments before her match at the U.S. Open, sister Venus Williams was asked about becoming an aunt.

“Obviously I’m super excited. Words can’t describe,” she told ESPN.

Serena Williams had the baby in West Palm Beach, Fla., ESPN reported.

“I’m so thrilled for her, what a role model she’s going to be for that daughter,” ESPN commentator Chris Evert said during Friday’s afternoon broadcast of the U.S. Open. “I told Serena this, it’s a love you’ve never felt before and I know she’s probably experiencing that right now.”  More….