Kim Clijsters and husband Brian Lynch welcomed their third child to the world.
The former No. 1 shared this image of her adorable newborn son, Blake Richard Lynch.
Clijsters and Lynch are also proud parents of a daughter, eight-year-old Jada, and a three-year-old son Jack.
The four-time Grand Slam champion announced her pregnancy back in April.
Six years ago, daughter Jada was on hand when Clijsters crushed Vera Zvonareva, 6-2, 6-1, to capture her third US Open championship.