Henin won seven Grand Slam singles titles and spent 117 weeks atop the WTA rankings, while Safin collected two major crowns and spent nine weeks atop the ATP rankings.
Safin is a two-time Grand Slam Champion (2000 US Open and 2005 Australian Open) and the twice Davis Cup champion, winning the trophies with the Russian national team in 2002 and 2006.
Clijsters has announced that she'll be leaving the sport after the U.S. Open in September.
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