Comeback queen Clijsters still harboring Grand ambitions

Seven years after retiring from tennis a second time, Kim Clijsters is attempting another comeback at age 36.

The former No 1 and four-time major champion, who already is a member of the International Tennis Hall of Fame, is planning to return to the pro tour in 2020, although she's not yet ready to say exactly when or where or how often she will compete.

"My goal right now ... is to be able to get fit enough, and ready tenniswise, to compete at the highest level. That to me would be my challenge, as of right now. And if you get to that stage, then you push yourself, and then it might be like, 'Hmm, let's see if I can get, I don't know, to the second week of a Grand Slam.' I'll constantly push myself, I think, if I feel that I'm getting better and improving," Clijsters said.