If you screw up you'll find your ass in Allentown prison. Forget tennis, cause there are some twisted cons there that would sooner cut you than give up their court time. ON.CA Attribute the joke's source if at all possible. I will reply, mailers willing. Extra jokes may be rejected.
Several people put in strong recommendations for the book.
The article is reportedly by Lyman Spitzer. It is in fact, much older than that book, reportedly appearing in the American Mathematical monthly in the 30s.