Tennis fans will likely see a little less Serena Williams on the court this season as the 35-year-old prepares to have her first child. On Wednesday, the 23-time Grand Slam champion showed off what appeared to be a nice baby bump on Snapchat, indicating that she was 20 weeks along.

The news isn't entirely unexpected as Williams has long hinted that she wanted to be a mother some day, but the timing is a bit of a surprise. Just days ago, she implied on Instagram that she was not pregnant while promoting her friend and former Destiny's Child singer Kelly Rowland's new book for expecting mothers.

"One of these days I hope to apply this," Williams wrote of the lessons in the book. She added, though, "But for now I'll stick to my dog Chip."

Williams has remained active in her pregnancy. For one, if she is about five months along, that means she was pregnant when she won the Australian Open. It also means she's due in early September, around the same time as the U.S. Open.

Williams also recently posted pictures of herself vacationing with fiance Alexis Ohanian, the co-founder of Reddit, in Jamaica, where she went ziplining.

Neither Williams nor Ohanian have posted anything else on social media or commented publicly on Williams's news, but her fans instantly chimed in, congratulating her on her latest achievement.

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