Also included in the 2011 calendar is the Hopman Cup, which does not distribute ranking points, and is organized by the ITF.
This is the complete schedule of events on the 2011 calendar, with player progression documented from the quarterfinals stage.
[18] 2 For the first round only, any player who competes in a live rubber, without a win, receives 10 ranking points for participation.
[18] 4 Performance bonus awarded to a singles player who wins 8 live matches in a calendar year.
Following is a list of notable players (winners of a main tour title, and/or part of the ATP rankings top 100 (singles) or top 50 (doubles) for at least one week) who announced their retirement from professional tennis, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the 2011 season: Following is a list of notable players (winners of a main tour title, and/or part of the ATP rankings top 100 (singles) or top 50 (doubles) for at least one week) who came out of retirement from professional tennis during the 2011 season: