First, No. 1 seed Caroline Wozniacki—the favorite to win the U.S. Open—fell to Vera Zvonareva in straight sets on Friday 6-3, 6-4. Now this: Kim Clijsters beat Venus Williams 4-6, 7-6 (2), 6-4. It was her 20th straight victory at Flushing Meadows. “Obviously, this is what you try to achieve,” Clijsters told the AP. “I never expected I’d come back in this position. I was trying to do it. It wasn’t easy but I stuck with it, so you can have these moments.” Clijsters, the defending women’s champion, could become the first woman since 2001 to defend her U.S. Open title. Clijsters and Zvonareva will face off for the championship Saturday night.