Kim Clijsters winning at Australian Open

Kim Clijsters just wants everyone to know she's not pregnant again.

She brought up the subject herself — right there on the Australian Open stadium court before an interviewer Thursday — and swatted down the misguided chatter.

Clijsters has already quit tennis once to get married and have a child, only to return after 2 ½ years and win the 2009 U.S. Open. She comes into the Australian Open after capturing the U.S. Open again last year and is fast emerging as the favorite in a draw missing injured defending champion Serena Williams.

She's dropped only four games in two rounds.

Clijsters made the most of her chance with on-court interviewer Todd Woodbridge. The doubles great had sent a text message to fellow Australian Rennae Stubbs saying in not-so-subtle terms that Clijsters was acting and looking as if she's pregnant.

Problem was, Stubbs showed Clijsters. Lucky all three are friends.

"You thought I was pregnant?" she chided Woodbridge, laughing and patting him on the shoulder. "No, I'm not."

Results

• No. 3-ranked Novak Djokovic advanced to the fourth round after playing just one set against Serbian Davis Cup teammate Viktor Troicki. Troicki retired due to a stomach problem.

• Andy Roddick overcame a slow start before powering home with 32 aces to beat Robin Haase 2-6, 7-6 (2), 6-2, 6-2.

• Defending champion Roger Federer beat Xavier Malisse 6-3, 6-3, 6-1 to earn his 57th career win at the Australian Open, surpassing Stefan Edberg's Open Era record.

• Justine Henin was eliminated, losing 6-4, 7-6 (8) to Svetlana Kuznetsova just a year after reaching the final in her comeback to Grand Slam tennis.