Both Steps and Petzschner won their matches in straights.
Could the courts they're playing on not be made of muggy cement as earlier reported?
Serra and Picasso has met twice before (both on clay), and Picasso won both. If you look at the serve stats from both matches, it is obvious the courts are slow as can be.
Wins from HC-monsters like Andujar and RRH says a lot two.