If you have been playing pick 'em for a while (and maybe even if you haven't), you'll be au fait with the nicknames we use for some of the players. Most of them are their real nicknames, some of them are pick 'em specific. Anyway, this is a quick reference for those who may be a bit confused!
N.B. Don't worry, these nicknames are only used in pick 'em banter threads and sometimes in the 'winner pick' column on the results pages, the players' real names are shown on the entry forms!
(Partial copy from the old forum, in year-end 2007 ranking order)
INDIVIDUAL PLAYERS
Fed = Federer
Riff-Raff, Rafa = Nadal
Nole = Djokovic
Undertaker, Kolya, Donkey = Davydenko (Undertaker because in a pic that I can no longer find, he really, really looked like one!)
Pics = Ferrer (see below)
Duckboy = Roddick (because he looks and walks like one - they even had Andy Rod-ducks for sale on his site

- hence the virtually all-female AR.com team being known as the Ducklings, much to their annoyance)
Gonzo = Gonzalez (it's no coincidence that he used to be on the Muppet Show!)
Dammit = Gasquet (see below - hence the RG.com team being known as the Dammitaires)
Numpty = Nalbandian (because he just is! - his countrymen seem to call him Daveeeeeeeeeeeeed though

)
Rock On = Robredo (I refuse to explain this one!)
Muzza = Murray
Bunny = Haas (new for this year, his German nick is Hasi, which is usually translated as this, even though it means hare ...)
Flake = Blake ("only the crumbliest, flakiest choker") - with thanks to SuperBrat from the Centre Court team!
Berdbrain = Berdych (apparently his real nickname is Pertikos!)
Slick Willy = Canas
Baggy = Baghdatis
Cmawwwn, Rusty = Hewitt (Rusty is his real nickname, as printed on the back of his shoes ... he has plenty of other nicknames too, but this is a family site

)
Count Duckula, the Count = Stepanek (his main nickname now seems to be 'sexy' after his liaisons with Hingis and Vaidisova, but I prefer my Count Duckula one!)
Tipsy = Tipsarevic
Madman, Dinara's lower-ranked brother = Safin
Potty = del Potro
Kohli, Cabbage-Writer, the German Gasquet = Kohlschreiber
For country-specific nicknames, etc, please see post 21.