International Series Gold (previously known as the Championship Series) was a series of professional tennis tournaments held internationally that were part of the ATP Tour. International Series Gold offered players cash prizes (purses from $755,000 to $1,426,250 as of 2008) and the ability to earn ATP ranking points. The tournaments were positioned below the ATP Masters Series, and above the ATP International Series in terms of prize money and ranking points available. See Association of Tennis Professionals#Rankings for more details.