I need assistance from the pros on this one: when you purchase a tennis racket from another individual, what do you or can you look for to tell if the racket is a fake? Some time ago, I bought two Yonex RDX 500's from Tennis Warehouse. Unfortunately, I eventually cracked the frame on one of them when the racket slipped out of my hand while serving. I went on for some time with just the remaining one racket, but eventually decided to purchase a second one about two years ago from another individual. I would have purchased another from Tennis Warehouse, but I believe they had already discontinued the racket by that time. Unfortunately, I never really had the chance to play with my newly purchased RDX 500 racket that much until just recently. I've noticed the racket seems slightly lighter, and the feel of the racket just feels different when compared to my other RDX 500, the one which I know is real which was purchased from Tennis Warehouse. The serial numbers have been engraved, and looking at the rackets everything looks virtually identical. I haven't weighed the rackets, but just holding them in my hands, it feels lighter, and hitting with them, they feel different even when strung with the same string at same tension. I'm positive this is a fake - and I have to say, this is one very convincing fake. Pictures will come, but in the meantime, thoughts?