2000 ATP Tour
The Association of Tennis Professionals (ATP) Tour is the elite professional tennis circuit organised by the ATP tour. The 2000 ATP Tour calendar comprises the Grand Slam tournaments (supervised by the International Tennis Federation (ITF)), the tennis event at the 2000 Summer Olympics, the Tennis Masters Series, the ATP International Series Gold, the ATP International Series, the ATP World Team Cup, the Tennis Masters Cup and the ATP Tour World Doubles Championships. Also included in the 2000 calendar are the Davis Cup and the Hopman Cup, which do not distribute ranking points, and are both organised by  the ITF. Schedule. Schedule of events on the 2000 calendar, with player progression documented from the quarterfinals stage. 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 2000 ATP Tour: the Grand Slam tournaments, the tennis event at the Summer Olympics, the year-end championships (Tennis Masters Cup and ATP Tour World Doubles Championships), the Tennis Masters Series, the ATP International Series Gold, and the ATP International 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 Series wins, one year-end championships equalling one-and-a-half Masters Series win, one Olympics win or Masters Series win equalling two International Series Gold wins, one International Series Gold win equalling two International Series wins); 3) a singles > doubles > mixed doubles hierarchy; 4) alphabetical order (by family names for players). ATP rankings. These are the ATP Rankings of the top  twenty singles players, doubles players, and the top ten doubles teams on the ATP Tour, at the end of the 1999 ATP Tour, and of the 2000 season, with number of rankings points, number of tournaments played, year-end ranking in 1999, highest and lowest position during the season (for singles and doubles individual only, as doubles team rankings are not calculated over a rolling year-to-date system), and number of spots gained or lost from the 1999 to the 2000 year-end rankings. Retirements. 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 2000 season: