He's thumping his serve, flattening out his forehand, and playing great at the net. He can really make a deep run if he continues. He's got an easy next match and then onto (most likely) Del Po, who hasn't been putting on an excellent show at all. So Roddick, if he continues to play well, will take him down (my guess, in 4 with a tie-breaker or two), and then on to Djoker. Which will certainly be a better match. He will undoubtedly put on a better show than he did at the Olympics.