Melanie Oudin was stunned in the quarterfinal round of the Cellular South Cup in Memphis. The 2nd seed Oudin lost to qualifier Sofia Arvidsson in straight sets. Three straight days of playing, following her return from the Open GDF Suez in Paris, seemed to take a toll on Oudin, who was soundly beaten in every category.
Arvidsson will meet Anne Keothavong in the semifinal round. The other upset of the day was No. 5 Petra Kvitova defeating No. 3 Kaia Kanepi in 3 sets.
The top-seed, Maria Sharapova, continued her dominance with a victory over Elena Baltacha.
For the men at the Regions Morgan Keegan Championships, all of the remaining seeds won, led by No. 1 Andy Roddick. Roddick was a straight set victor over Yen-Hsun Lu.
No. 5 Tomas Berdych defeated Michael Russell in 3 sets. 8th seed Sam Querrey won against Leonardo Mayer in straight sets.