Hi, I know there has been a topic about this sock before but there has not been a discussion about double socking for this. This sock (which I have) has the black line up the back as some of you may know. I am wondering if anyone knows which sock fits perfectly over this one. The majority of Dri-Fit socks are longer than this crew so there is a heavy off-set. The newer TW crew socks have a grey swoosh whereas the Elites have a black swoosh. I have done a lot of research on this but have not been able to find an answer. I also tried to find out exactly which socks Federer wears but no one seems to know that as well. I doubt he even feels the sock on his foot with all of that ankle tape anyway. Is anyone else battling this issue?