Tennis Player Serena Williams finally delivers her baby

Serena Williams has given birth to a baby girl, right in the middle of the US Open. WPBF-25 news producer Chris Shepherd made the announcement on Twitter, citing a source at St. Mary's Medical Center in West Palm Beach, Fla.:

 Serena Williams gave birth to a baby girl weighing 6 pounds, 13 ounces. Mom and baby doing well.

— Chris Shepherd (@ChrisShepherd) September 1, 2017

According to CBS12, Serena Williams was officially in labor on Thursday night. The 35-year-old was induced; her hospital floor was cleared and security has been on hand. This is both her and fiancé Alexis Ohanian's first child.

The 23-time Grand Slam champion had said she would wait until delivery to find out the gender of her baby. She has also hinted at a comeback to the tour as soon as the Australian Open, which would give her just over three months to prepare.

Shortly after reports of the birth broke, Venus Williams walked onto Arthur Ashe Stadium to play her third-round match against Maria Sakkari. Just before she did, the 37-year-old was asked by ESPN's Pam Shriver about the news.

"Obviously I'm super excited," Venus said about becoming an aunt. "Words can't describe."

Congratulations for the new parents came on social media, including from fellow players:

Congrats Serena!!! So much joy for you!!! https://t.co/u4edTrqIbB

— Rafa Nadal (@RafaelNadal) September 1, 2017

@serenawilliams So excited for you & @alexisohanian! Can't wait to see you, hold your little girl and squeeze her tiny fingers + toes.

— Billie Jean King (@BillieJeanKing) September 1, 2017

Congrats @serenawilliams https://t.co/3kK6pFlRYx

— Sabine Lisicki (@sabinelisicki) September 1, 2017

Congratulations @SerenaWilliams for your baby girl. I am so happy for you and I feel your emotion. Recover well & enjoy without limitation.

— PATRICKMOURATOGLOU (@pmouratoglou) September 1, 2017

Congratulations @serenawilliams and @alexisohanian on the birth of your baby girl

— TamiraPaszek (@tamira1990) September 1, 2017