I think we are seeing a real precedent set in this year's tournament after Nadal's loss. The so called smaller players truly believe they can beat the top dogs. Their high risk, go for it tennis which involves them hitting huge serves and forehands is uncomforting to the likes of Rafa and as we saw last night, Roger Federer. Stepanek even made it difficult for Djokovic for one set until the Serb's all round game, fitness and class shown through.
Even in the Karlovic vs Murray game we saw that, with the Scots determination to get involved with long rallies key to downing the Croat. It has made for an exciting tournament thus far, full of many suprises but the most impressive players by far are Djokovic and Murray to date and that is my bet for the final with both sides of the draw almost certain to open up for them on current form.