Well just wanted to write a quick write up on how you can tell apart a authentic BABOLAT AEROPRO DRIVE CORTEX tennis racquet from a fake. First thing is the fake one would significantly weigh alot lighter than an authentic one or heavier usually lighter. Second, under the original grip there should be a serial number. Third thing is that inside the handle (grip) if you open the backdoor (emblem under handle) it should not be hollow it should be filled. On a fake the paint job would be most likely obvious and the where the letters are positioned would not be the same as an authentic one. The number of string holes is another tip, and how the pattern is on the grummet, also how thick the throat of the racquet is. I hope this guide was helpfull if you have any questions just let me know my eBay user id is: 661-garage. Thank you.