Serena Williams gives birth to baby girl - BBC News
The 35-year-old tennis superstar has her first child with partner Alexis Ohanian.
Parents-to-be Serena Williams and Alexis Ohanian in New York in May

Tennis star Serena Williams has given birth to a baby girl at a clinic in Florida.

Williams, 35, whose partner is Reddit co-founder Alexis Ohanian, was admitted to the St Mary's Medical Center in West Palm Beach on Wednesday.

The 23-time Grand Slam winner said last month she was planning to return to tennis for the Australian Open in January.

Congratulations have been pouring in from sports stars and celebrities.

News of the birth came as her sister Venus prepared to go out on court at the US Open.

"Obviously I'm super-excited," Venus said. "Words can't describe it."

The couple are yet to confirm the birth themselves but Serena's coach, Patrick Mouratoglou, tweeted: "I am so happy for you and I feel your emotion."

He added: "Btw ... I wish you a speedy recovery... we have a lot of work ahead of us."

Serena admitted she had revealed her pregnancy to the world in April by accident, after mistakenly uploading a photograph on Snapchat.

She won the Australian Open title this January while newly pregnant, and in an article in Vogue last month she said she wanted to defend her title.

"It's the most outrageous plan," she said. "I just want to put that out there. That's, like, three months after I give birth."

In June she appeared in a nude cover photo for Vanity Fair, saying: "I don't know what to do with a baby."

The news has delighted the tennis world, with Rafa Nadal among the first to tweet his congratulations.

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At a news conference Garbine Muguruza joked; "a baby girl? Well, I hope she doesn't play tennis," Reuters reported.

Singer Beyonce posted a portrait of a pregnant Williams on Instagram, with the message: "Congratulations Serena!"

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Some on social media have, like Muguruza, been speculating about the baby's potential tennis ability.

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• None How did she compete while pregnant?