Justine Henin is pregnant with her second child, the former world No. 1 has announced on social media.
"We are super happy to announce that our family will expand," the 34-year-old wrote.
The child is expected to be born in the first half of next year.
Henin and her husband, Benoit Bertuzzo, also have a daughter, Lalie, who is three-and-a-half years old.
The Belgian currently runs a tennis academy, and is a coaching consultant for Elina Svitolina, who trains at the academy.
Henin won seven Grand Slam titles during her Hall of Fame career.