Also included in the 2020 calendar were the tennis events at the Next Generation ATP Finals, and the Laver Cup, neither of which distributed ranking points.

Several tournaments were suspended or postponed due to the COVID-19 pandemic, including the Summer Olympics in Tokyo.

[4][5][6][7][8] On 17 June 2020, ATP issued the revised calendar for Tour resumption.

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 2020 season.

The following is a list of notable players (winners of a main tour title, and/or part of the ATP rankings top 100 in singles, or top 100 in 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 2020 season: