Was wondering what prestige he is using these days. As I can see it is 16x19, so he made that switch from the old days (18x20 PC600). Could it be prestige s?.... from pictures that I found I can't tell which model it is. http://www.zimbio.com/photos/Goran+Ivanisevic/2012+Australian+Open+Day+6/B54o05TtZ9x Yesterday he commented match on PBZ Indoors in Zagreb, and he said about strings in tennis world that there is great tech improvement, and that in 90's when he played, if he missed sweet spot on serve that his whole body was under vibration, from arm to legs, and that in now days it is pretty much easier.