Originally Posted by Neely
The majority of ISG events are on surfaces other than hardcourt, too. (or grass, or indoor).
Acapulco, Barcelona, Kitzbhuel and Stuttgart are the only ISG events on clay thank you very much.
Memphis, Rotterdam, Dubai, Tokyo and Vienna are ISG events, therefore forming the majority.
4 out of 14 of the biggest events on clay, so there is a real bias to those events.