Djokovic is the man no doubt. A truly all time great tennis legend. I think he will reach double figures, but whether he surpasses Rafa we'll see. After that it's more climbing (Sampras, Laver, and touching Fed will take a massive effort from Nole, like needs to dominate several more years and win a *****load of titles). He is one of my favorite players though. Very alright in my book (for more than one reason).