Quick, everybody who predicted there would be more Argentines than Americans in the men's quarterfinals please raise your hands.

I thought as much.

With Rajeev Ram losing a tough three-set match to France's Florent Serra, Sam Querrey is the only American left in the men's draw. Querrey, the No. 6 seed, will face top-seeded and 2006 champion Nikolay Davydenko at 1 p.m. Thursday on Stadium Court. Right around the same time, Argentina's Leonardo Mayer faces No. 7 seed Igor Andreev of Russia.

The third quarterfinal of the day will be Austria's Jurgen Melzer vesus No. 2 seed Fernando Verdasco of Spain who overcame two rain delays to top Italy's Andreas Seppi. That is currently the fourth match on the Grandstand Court but there is a chance it could be moved.

The final semifinal berth won't be decided until late Thursday night when Argentina's Jose Acasuso plays Serra.

On the women's side, the final third round match between Marion Bartoli and Magdalena Rybarikova just started. If Bartoli wins, five of the top eight seeds will be in the quarters.

However, the first quarterfinal will feature two of the three unseeded players as 2008 finalist Anna Chakvetadze plays Elena Vesnina in an all-Russian quarterfinal. Defending champion and No. 2 seed Caroline Wozniacki will face Virginie Razzano after the conclusion of the 1 p.m. Davydenko/Querrey match. The Bartoli/Rybarikova winner will play third-seeded Flavia Pennetta. It will be the third match on the Grandstand Court and will not go off before 3 p.m. The highlighted women's match is the 7 p.m. showdown between top seed Svetlana Kuznetsova and eighth-seeded Amelie Mauresmo.