
We have seen Fernando Gonzalez beaten Fedex in Shanghai Open and I believe it's still possible for Gonzalez to do that again but not in crucial finals and in the Grand Slams. So does Novak Djokovic and David Ferrer. However, these two players might surprise us based on their excellent performance this year. As for Nikolay Davydenko, he has landed himself in too many controversies including a match-fixing accusation. And I don't see him as a big threat to Fedex although he is the world number 4 as Fedex has a series of record of beating him in straight sets.
The only player besides Nadal whom I can see giving tough challenge to Fedex next year is David Nalbandian. Nalbandian is a very talented player and there have been some great battles between them in the past. This Argentinian player could step up and raise to be among the top 3 players next year.
Fedex is still going to dominate the professional tennis scene in 2008. But the question is, will he improve even more on clay court like what he did earlier this year?