Originally Posted by HarryB-97
nadal has already used this string since the australian open, you can see here how he is using the twisted string, i noticed it a while back but didn't think anything of of but take at look at this really carefully and you will see it, especially in the crosses http://www.bbc.co.uk/sport/0/tennis/
zoom in if you can to get a better look
False, as skippy has just confirmed. You're just seeing string wear.