If you remember, at the US Open he lost a set to Kiefer and then another to Hewitt. He wasn't hitting the ball as cleanly as usual then either. He did what it took to win. The true mark of a champion is winning these tough matches, saving 6 set points if you have to against a tough pusher. His game always seems to come back when it needs to, a la the Haas match. I think he'll roll over a tired Kiefer next match. NK has played a lot of tennis, and I'm not sure he's equipped to take on Fed. OTOH, Nalbandian and Baghdatis are set to have a very tough SF match. I expect it to go at the very least 4 tough sets. If he gets to the final, he's got a great shot at winning like he usually does. He knows exactly what he has to do against Nalbandian, and I think the surface suits Fed's game better than Nalbo.