The Association of Tennis Professionals (ATP) World Tour is the elite professional tennis circuit organised by the ATP. The 2009 ATP World Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the ATP World Tour Masters 1000, the ATP World Tour 500 series, the ATP World Tour 250 series, the ATP World Team Championship, the Davis Cup (organized by the ITF), and the ATP World Tour Finals. Also included in the 2009 calendar is the Hopman Cup, which does not distribute ranking points, and is organised by the ITF.