Olympic gold medalists Venus and Serena Williams posed together for the cover of New York Times magazine. The Williams sisters flaunted their six-pack abs while wearing sports bras with shorts and a tennis for the black-and-white cover image.

For the exclusive interview, Venus discussed her comeback after being diagnosed with an incurable illness and Serena speaks on her explosion at a lines-woman at the US Open 2009 semi-final match.  

The 30-year-old's verbal assault on the line judge made headlines when she screamed: "If I could, I would take this ******* ball and shove it down your ******* throat".

Williams reportedly threatened to kill the lines woman, and a microphone picked up her words, stating "I didn't say I would kill you. Are you serious?" Williams was penalized for the offensive remarks.

"I was definitely stressed, and I was angry," Serena told the New York Times. "I don't foot-fault. Like, I have in the past, but this woman should never make a call in the semifinals of a Grand Slam on a person who doesn't foot-fault. She was totally wrong. I'm sorry. I'm not sorry. I looked at her like - I tried to warn her. And then she did it again. And I'm thinking, this is ridiculous."

The Williams sisters will play at the U.S. Open 2012 when it begins on Monday, Aug.27

Although the younger Williams sister lost a match in Cincinnati on Friday, Aug. 17 to German tennis player Angelique Kerber, she has won 19 matches since May prior to the London Games.

The older Williams sister, Venus, is reportedly feeling good enough to play at the U.S. Open 2012 after withdrawing last year due to her illness. The 32-year-old announced last year that she has Sjogren's Syndrome, an incurable autoimmune disease that can cause fatigue, joint pain and dryness of the eyes and mouth.

Venus beat Samantha Stosur to advance to the semifinals in singles in Cincinnati on Friday, Aug 17. 

View the inside photos the Serena and Venus Williams in the New York Times Magazine and behind-the-scenes video.