Serena Williams and Caroline Wozniacki: Friends, Confidantes and Opponents …

Serena Williams is once again steam rolling through the US Open, having reached the quarterfinals of the tournament she's won the last two years. She faces Italy's Flavia Pennetta next, and then likely Victoria Azarenka in the 

After a frustrating Grand Slam season for Serena Williams, the No. 1 women's player in the world is finally back where she belongs. The reigning U.S. Open champion trounced No. 17 Ekaterina Makarova, 6-1, 6-3, to reach her first Grand Slam final of the

Two months later, Serena again looks unbeatable after thrashing Ekaterina Makarova 6-1, 6-3 in a brutal semifinal match. And make no mistake, she loves proving people wrong. Many wondered if she'd show up at the season's final major, but she laid down 

For five years Caroline Wozniacki has tried to get back to a Grand Slam final. She finally got there Friday on the tennis version of a technical knockout. Under a hot sun and in a warm swirling wind, Wozniacki literally beat Peng Shuai of China into

Top seed Serena Williams is into the last four in New York after a confident straight-sets victory over Flavia Pennetta.