Mislim da prije svega ima veze sa načinom kako je šljaka pripremljena jer je Novak milion puta igrao na mokroj šljaci:
Citiraj:
CLAYCOURTS:
1 Clay particles: The ball loses most speed on clay because (i) some of its kinetic energy is lost displacing the clay (crushed brick), that make those “mini-craters” on the surface, and (ii) the numerous clay particles cause more frictional force between ball and court. The thicker the layer of clay on top, the slower the ball would go. Usually, there is only 1–2 mm of clay kept on top … anymore and the court would be too slow, and further complications will arise, like uneven bounces.
2 Crushed stone layers: There are usually 3–4 layers of crushed-and-pressed stone underneath the top clay layer, one of which is usually a limestone bed. These hard layers cause most of the high bounce you see on television, since harder layers resist deformation and don’t allow the ball to lose energy — the bounce is usually higher than on the hardness of a hardcourt.
1. Što je deblji sloj šljake veća je sila trenja između terena i loptice i ona gubi na brzini. Manje šljake - manje trenja.
2. Slojevi drobljenog kamena ispod šljake izazivaju veći odskok loptice nego na drugom podlogama.
Znači treba znati napraviti balans između količine šljake i drobljenog kamena da bi se dobila kvalitetna podloga, što oni nisu odradili.
Rezultat na kraju možda i nije loš jer će Novak mučenjem na ovom kršu da se bolje spremi za laganije šljake u Madridu i Rimu (u fazonu Roki u mesari, Drago u laboratoriji).