Kim Clijsters competes in the 2012 U.S. Open, her last tournament before… (Larry W. Smith / EPA )
Kim Clijsters gave birth to her second child, Jack Leon Lynch, on Wednesday, both the retired Belgian tennis great and husband Brian Lynch announced on Twitter.
— Kim Clijsters (@Clijsterskim) September 18, 2013
Clijsters, 30, first topped the WTA rankings in 2003.
She had one singles Grand Slam title -- the U.S. Open in 2005 -- and two more in doubles -- the French Open and Wimbledon in 2003 -- before retiring in 2007 to start a family with Lynch, an American who played professional basketball in Europe for nine years.
Soon after the birth of their daughter, Jada Elle, in 2008, Clijsters returned to tennis and proceeded to win three more Grand Slam singles titles -- the U.S. Open in 2009 and 2010 and the Australian Open in 2011 -- and returned to the top of the world rankings.
She retired again last year after the U.S. Open.
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