Serena Williams was "terrified" when she discovered she needed an emergency Caesarean-section in order to deliver her baby.
The 36-year-old tennis star welcomed her daughter Alexis Olympia - whom she has with her husband Alexis Ohanian - in September last year and underwent the emergency procedure after suffering from chest pains 14 hours after her due date.
Serena opened up about the ordeal a few months after Olympia's birth, but in the season premiere of her new HBO documentary series 'Being Serena', she admitted feeling "a whole new kind of fear" when she was sent for surgery.
She said: "One minute, everything's going according to plan, and then I'm being wheeled off for surgery. I was terrified, and it was a whole new kind of fear."
Her husband, Reddit co-founder Alexis, added: "The C-section was low on our wish list because of her history with blood clots. Any surgery that Serena has is potentially life-threatening. But we decided, 'Well, OK, for the safety of Mom, for the safety of the baby, we have to proceed with a C-section."