As the 2008 U.S. Open enters its second and final week, the playing field has been narrowed down considerably. After the third round of men's singles matches, the following players remain in the running: Andy Roddick (USA), Novak Djokovic (Serbia), Roger Federer (Switzerland), Fernando Gonzalez (Chile), Tommy Robredo (Spain), Nikolay Davydenko (Russia), Gilles Muller (Luxembourg), Igor Andreev (Russia), Rafael Nadal (Spain), Mardy Fish (USA), Sam Querrey (USA), Gael Monfils (France), Kei Nishikori (Japan), Juan Martin Del Porto (Argentina), Andy Murray (Great Britain) and Stanislas Wawrinka (Switzerland). The men enter the fourth round of play today, September 1, 2008.