1 Kim Clijsters, who announced Thursday that she is returning to professional tennis at the age of 36.
"For the past seven years, I've been a full-time mom," Clijsters, who has three children, said in a video posted to Twitter.
With her US Open win in 2009, Clijsters became the third WTA player to win a major after giving birth, following Margaret Court and Evonne Goolagong.
"Kim Clijsters ranks among the greats of the game and her return to the Tour is exciting news for the WTA family and tennis fans around the world," WTA chairman and CEO Steve Simon said in a statement.
1 and grand slam champion, Clijsters will have access to unlimited wild cards.