The 2011 ATP World Tour was the elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2011 season. It was the 42nd edition of the tour and the calendar comprised 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 2011 calendar is the Hopman Cup, which does not distribute ranking points, and is organized by the ITF. In singles, Novak Djokovic dominated the season. He won ten tournaments, including three Grand Slam (Australian Open, Wimbledon Championships and the US Open), and five Masters Series 1000 titles (Indian Wells, Miami, Madrid, Rome and Canada). He ended the year with a 6–0 record against Rafael Nadal and a 4–1 record against Roger Federer. Schedule This is the complete schedule of events on the 2011 calendar, with player progression documented from the quarterfinals stage. Key January February March April May June July August September October November Statistical information These tables present the number of singles (S), doubles (D), and mixed doubles (X) titles won by each player and each nation during the season, within all the tournament categories of the 2011 ATP World Tour: the Grand Slam tournaments, the ATP World Tour Finals, the ATP World Tour Masters 1000, the ATP World Tour 500 series, and the ATP World Tour 250 series. The players/nations are sorted by: 1) total number of titles (a doubles title won by two players representing the same nation counts as only one win for the nation); 2) cumulated importance of those titles (one Grand Slam win equalling two Masters 1000 wins, one ATP World Tour Finals win equalling one-and-a-half Masters 1000 win, one Masters 1000 win equalling two 500 events wins, one 500 event win equalling two 250 events wins); 3) a singles > doubles > mixed doubles hierarchy; 4) alphabetical order (by family names for players). To avoid confusion and double counting, these tables should be updated only after an event is completed. The tables are through to the tournaments completed in the week of 31 October. Key Titles won by player Titles won by nation Titles information The following players won their first main circuit title in singles,