He must've made the change recently, but it's kind of strange going from 93 sq.in. (which what his serve needs) to 100 sq.in. Has he changed his game too? I can't envision him hitting flat serves with that thing. http://www.chinaopen.cn/s2005/english.shtml It's the 5th image on their site To see Karlovic with a Flexpoint Instinct is like to see Philippousis and Safin with Flexpoint Instinct too.