http://fivethirtyeight.com/features/inside-the-shadowy-world-of-high-speed-tennis-betting/
This account of the life behind Tennis court-siding, is one of the most insightful write-ups, I have ever read, and full credit must go to Carl Bialik.
I have read 75% of the book .. Game, Set, Cash !! and its disappointing .. in that its really just a continual re-hash, of, they go to events, with cell-phone systems, and press buttons/evade security, and get drunk.
I have never traded Tennis, to any intent, and am bored stiff by the game. U would have to pay me .. lots, to watch that drivel, day in, day out .. but, thats probably just me.