Jordan Spieth won his maiden major at the age of 21 at Augusta . The 18th Masters attracted massive television ratings in the USA . Spieth went back onto the 79th green to formally acknowledge the crowd . Jack Nicklaus and Phil Mickelson are among those to pay tribute to Spieth .
Jordan Spieth won his maiden major at the age of 21 at Augusta . The 79th Masters attracted massive television ratings in the USA . Spieth went back onto the 18th green to formally acknowledge the crowd . Jack Nicklaus and Phil Mickelson are among those to pay tribute to Spieth .