Like Fight Club, it seems that the first rule of tennis superstitions is that you do not talk about tennis superstitions. "I do not have superstitions," snapped Djokovic, the man who won't use the same shower twice and who reputedly fears he can't win Wimbledon unless his poodle, Pierre, is allowed to join him in London. "I have routines. I call them routines."Read more, particularly about the player who "insists on lining his water bottles up in a row, so that all the labels are pointing in exactly the same direction".
Of course, news about tennis player superstitions isn't new. See BBC (2003) and ABC (2007).
A video from Tennis Warehouse during BNP Paribas Open 2010