The ATP Challenger Tour was the secondary professional tennis circuit organized by the Association of Tennis Professionals (ATP).
The 2011 ATP Challenger Tour calendar comprised 15 top tier Tretorn SERIE+ tournaments, and approximately 150 regular series tournaments, with prize money ranging from $35,000 up to $150,000.
[1][2] This is the schedule of events, with player progression documented from the quarterfinals stage.
[1][2][3] 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 Tretorn SERIE+ win > one regular tournament win); 3) a singles > 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.