Kim Clijsters: The former world number one will return to tennis at the age of 36



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Kim Clijsters won the last of his Grand Slam titles at the 2011 Australian Open.

Kim Clijsters will return to tennis at the age of 36 with a return to the WTA Tour in 2020.

The former Belgian world number one retired in 2007 to start a family, two years after winning his first Grand Slam at the US Open.

She came back in 2009 and won two more titles at the US Open and the Australian Open before her second retirement in 2012.

"I do not really want to prove anything, I think for me it's the challenge," Clijsters said.

In the WTA Insider podcast,