Photo: Nicholas Hunt/Getty Images

Serena Williams has given birth to a baby girl with fiance Alexis Ohanian, according to her sister, Venus Williams. Us Weekly also reported the news.

As Venus stepped onto the court to play her third-round U.S. Open match against Maria Sakkari, she was asked about Serena, who had reportedly gone into labor earlier in the day and given birth to a baby girl.

ā€œObviously Iā€™m super excited,ā€ Venus said. ā€œWords canā€™t describe.ā€

Serena first announced she was pregnant in April, meaning she won the 2017 Australian Open while nine weeks pregnant.