This is the complete schedule of events on the 2008 ATP Tour, with player progression documented until the quarter-final stage.

In most cases they are calculated at the US$0.85/EUR exchange rate, but it varies and is often rounded throughout the 2008 ATP Official Rulebook.

(^): Tennis Masters Cup: maximum number of points that can be assigned to the player at this round (after he qualified to the semifinal with 3 round-robin wins) (m): Tennis Masters Cup: minimum number of points that can be assigned to the player at this round (after he qualified to the semifinal with 1 round-robin win) +H: Any Challenger or Futures providing hospitality shall receive the points of the next higher prize money level in that category.

As of October 5, the following entrants remain entered in the competition:[3] Unlike the ATP Singles Race, the Stanford ATP Doubles Race uses only the best fourteen tournaments on a team's ranking with no mandatory tournaments counting towards the ranking.

[4] 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 2008 season: