Also included in the 2019 calendar were the Hopman Cup, the Laver Cup and the Next Gen ATP Finals which do not distribute ranking points.

For the Masters series events the ATP introduced a shot clock.

[2] 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 2019 ATP Tour: the Grand Slam tournaments, the ATP Finals, the ATP Tour Masters 1000, the ATP Tour 500 series, and the ATP Tour 250 series.

The players/nations are sorted by: The following players won their first main circuit title in singles, doubles or mixed doubles: The following players defended a main circuit title in singles, doubles, or mixed doubles: The following players achieved a career-high ranking this season in the top 50 (bold indicates players who entered the top 10 for the first time): These are the ATP rankings and yearly ATP race rankings of the top 20 singles players, doubles players and doubles teams at the current date of the 2019 season.

Prize money given in US$ as of November 25, 2019 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 100 [doubles] for at least one week) who returned from retirement, announced their retirement from professional tennis, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the 2019 season: Following are notable players who came back after retirements during the 2019 ATP Tour season: