I am reluctant to to make predictions at this stage. I will need to see at the least each player in a match. after all, Fed, Nadal, Agassi have not played for awhile and are recovering from injury. Ivan is also tired plus or injured and Gaudio, Coria, Davydenko and Nalbandian are not exactly in peak form. The only player in decent form is Ivan and the rest are either out of form or coming back from injury.
Although Ivan and Nalbandian have troubled Fed, Nalby more than Ivan as he holds a 5-3 h2h lead. However, its all about confidence in tennis and Nalby has suffered a couple of tough losses especially in Paris. And Ivan although has the game to beat Fed he lost all 3 meetings this year and they were tight. Some people might say that this suggests he might trouble him but i would disagree. I have played a guy a few times and we are both ranked LTA 6.1. I have won all 5 meetings and everytime he had chances. The fact is i still won and i Know that deep down even if i dont play well i can win despite his efforts. In some ways it is better if you play badly and lose to a difficult opponent that play great and lose a series of match like
Ivan. Losing hurts whether u play well or badly. So I don't see him going into the match with Fed with so much confidence. Its more likely to be Fed full of beans knowing that he can beat Ivan, has beaten him whilst not at his best and can again.