"Mr. Markovic's company made the courts at TK Green Set, and we were able to make sure of their quality and durability. At the beginning of the interview, Nenad Markovic explained what all kinds of hard (acrylic) courts exist, and how they all differ. He also explained which surfaces are played on US Open and Australian Open.
Considering that in Serbia are the most represented clay courts Mr. Markovic introduced two new tennis surfaces TOP CLAY and TOP SAND."