Original: The tournament was an event run by the International Tennis Federation (ITF) and Tennis Australia, that was part of the 2011 ATP World Tour and the 2011 WTA Tour calendars, under the Grand Slam category.
Simplified: The tournament was an event run by the International Tennis Federation (ITF). It was part of the 2011 ATP World Tour and the 2011 WTA Tour calendars, under the Grand Slam group.