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.
Read more about this topic: 2000 ATP Tour