Guess what! Serena Williams revealed pregnancy by accident

World number one Serena Williams, who is expecting her first child with American internet entrepreneur Alexis Ohanian, has said that she revealed her pregnancy by accident, after mistakenly uploading a photograph on Snapchat.

Serena had posted a picture on the social media app, posing in a mirror with the message: "20 weeks", before deleting it, with her publicist later confirming the news.

"You know how social media is; you press the wrong button and there it is," Sport24 quoted her as saying.

"I had been so good about it and this one time I slipped," she added.

The 23-time Grand Slam Champion has also vowed to return to the court after embracing motherhood, with her baby hopefully cheering for her in the stands.

"I definitely plan on coming back. My baby is going to be in the stands, hopefully cheering for me and not crying too much," she said.

She further confirmed that she will play no more this year.

She further said that it was just two days before the Australian Open when she came to know about the good news.

The 35-year-old said that she was quite nervous about playing the summit showdown, uncertain whether it would be dangerous for her or the baby.

"I had to take any negative emotions, bottle them up and figure out what the next step was," she said.

The top-ranked player went on to win her record-breaking 23rd Grand Slam title at the Australian Open in January, beating her elder sister Venus in the all-Williams final.

The American announced her engagement with Reddit co-founder Ohanian in December. She has not played on tour since her latest triumph in Melbourne.

The Tennis star is due to give birth in September, the same month of her turning 36.