Davydenko figured it out. Why don't players just watch those replays
It's not that Kolya (
) "figured it out", it's simply that his gamestyle was more suited for RAFA than most players in the ATP. In short, of of his main features was being able to take the ball extremely early, thus being able to absorve its power and also to hit it back at a comfortable height. This is of course highly valuable against deep topspin balls, the kind of game RAFA likes to play. Thus, he was able to deny RAFA of one of his main advantages v. the general tour.
Why don't other players do the same? Well, taking the ball early is extremely difficult as it requires impeccable timing. Agassi and Rios were players capable of doing this in their prime. It would have been interesting to see how well would they have coped against prime RAFA.
Then again, even Kolya struggled quite a bit against RAFA, which is a testament of how difficult it is to beat him even if your whole gamestyle is suited to play him.