Hingis, 30, the world's former No. 1 player, married French show jumper Thibault Hutin on Friday in a private civil ceremony in Paris, according to Swiss newspaper Sonntags Blick.
"Our wedding may take some by surprise," the paper quotes the bride as saying of the couple's ceremony, "but it has all been planned for some time."
The ceremony took place at city hall in the Paris suburb of Neuilly-sur-Seine, according to the Swiss magazine Schweizer-Illustrierte, which posted wedding photos on its Web site early Monday. A small family reception was held in the Presidential Suite of Paris's Hotel George V, and a traditional Swiss wedding feast will be celebrated next spring.
Hingis and Hutin, 24, met at a show-jumping competition in St. Tropez in April, shortly after she broke off a long-term engagement to Swiss attorney Andreas Bieri.
The couple are expected to honeymoon in the Maldives.
Hingis held the top women's ranking for over 200 weeks, dominating women's tennis while still in her teens. Injuries forced her from the professional circuit in 2002 at age 22. She made a comeback in 2005 but retired again in 2007.