Venus Williams was defeated by China's Li Na at the Australian Open earlier this week, but her sister avenged the loss. Serena Williams defeated Na in a semi-final match, 7-6 (4), 7-6 (1), progressing to the finals match on Saturday against Justine Henin, who came out of retirement to participate in the tournament.

"Every time I had match points, she came up with some big serves and great shots," Williams told the Associated Press about her match against Na. "She just goes for broke."

Serena, who is ranked No. 1 in the world, is of course favored to win the match. She's never lost an Australian Open finals match, since beating her sister Venus back in 2003. This will be Serena's fifth Australian Open final.

"I think we bring out the best game in each other," Serena said about her finals opponent Henin. "I think that we both just play our hearts out -- I think that's what creates a good rivalry."

But before that final match, Serena and Venus joined forces today in the doubles finals match against Cara Black and Liezel Huber, who are seeded No. 1 on the doubles tournament bracket, and won.

Once this tournament is over, the sisters will take a small break from the game to head out to the Super Bowl. Fans were hoping that they would play at the Fed Cup in France, Feb. 6 to 7, but since Venus and Serena are part owners of the Miami Dolphins, they rather network with other team owners.

"I really want to," Serena said of playing the Fed Cup, "but ... since I do own a football team, we have some owners' stuff that we have to do for the Super Bowl. Venus and I have to be there."