NEW YORK - Serena Williams unveiled her pregnant body in a nude Vanity Fair cover photo on Tuesday and detailed the story of her romance with fiance Alexis Ohanian in an article for the magazine.

The American 23-time Grand Slam singles champion proudly displays her pregnant stomach, with a small waist chain the only item she wears in the image by famed photographer Annie Leibovitz.

Williams said in the story she learned she was pregnant just before the Australian Open, which the 35-year-old American won to set the Open-era record for Grand Slam singles titles and move one shy of Margaret Court's all-time mark.