Tennis superstar Serena Williams confirms her pregnancy

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - early 29/1/17 Serena Williams of the U.S. poses with the Women's singles trophy after winning her final match. REUTERS/Edgar Su

(Reuters) - Tennis superstar Serena Williams is pregnant and expecting to deliver her first baby this fall, her spokeswoman said on Wednesday.

Confirmation of Williams' pregnancy, in a statement from publicist Kelly Bush Novak, came hours after the 35-year-old athlete posted a photo of herself in a yellow one-piece bathing suit on the social media site Snapchat with the caption "20 weeks."

(Reporting by Frank Pingue; Additional reporting and writing by Steve Gorman in Los Angeles; Editing by Chris Reese)