Didn't manage to try defense, the person which i'm sparing with me only hitting clears to back line. I ironically N9II suppose to be a 3u racket but after my short session with 4U 100ZZ&ZX, my N9II really feels light. I think it's mostly due to the aerodynamic frame design of N9II. I also have a 4U 88D too & i feel 100 is no where near 88D. 100 is definitely head heavy than 88D.