As far as I can tell, the ATP is the players union. They are not screwing the players, they represent the players.
http://en.wikipedia.org/wiki/Association_of_Tennis_Professionals
They organise the majority of tour events.
The grand slams are organised by the ITF. Tipsaravic said the players only get 11 - 13% of the prizemoney at the slams. If anybody is screwing the players, it is the ITF at the slams, not the ATP in the regular tour events.
http://www.nytimes.com/2012/01/16/sports/tennis/16iht-tennis16.html?pagewanted=all
It was an emotional occasion with Nadal and Andy Roddick and other speakers drawing extended applause and with growing support for pushing the Grand Slam tournaments to dedicate a greater percentage of their revenues to the players. While regular tour events routinely commit more than 30 percent of revenue to prize money, players claim that despite prize money increases, the Grand Slam event percentages remain considerably lower.
“They’re tired of the Grand Slams having the greatest deal in sport,” said a tour official who spoke on condition of anonymity.
As I said before, NOBODY in complaining about the ATP. They are complaining about the SLAMS. The slams are run by the ITF.
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS
ITF = SLAMS = SCREWING PLAYERS