Kim Clijsters is to make her tennis comeback at the age of 36 with a return to the WTA Tour in 2020.
The Belgian former world number one initially retired in 2007 to start a family, two years after winning her first Grand Slam at the US Open.
She returned in 2009 and won two more US Open titles and the Australian Open before her second retirement in 2012.
"I don't really feel like I want to prove something. I think for me it's the challenge," Clijsters said.
Speaking to the WTA Insider Podcast, she added: "The love for the sport is obviously still there.