It was the season-ending event for the highest-ranked singles players and doubles teams on the 2020 ATP Tour.

On 14 August 2020, it was announced the tournament would be held without spectators in attendance following guidelines imposed due to the COVID-19 pandemic in the United Kingdom.

[2] Wesley Koolhof / Nikola Mektić defeated Jürgen Melzer / Édouard Roger-Vasselin 6–2, 3–6, [10–5].

[4] The ATP Finals currently (2020) rewards the following points and prize money, per victory:[5] Eight players compete at the tournament, with two named alternates.

Furthermore, players who finished 2017 in the world's top 30 are commitment players who must (if not injured) include points for the 8 mandatory Masters tournament regardless of whether they enter, and who must compete in at least 4 ATP 500 tournaments (though the Monte Carlo Masters may count to this total), of which one must take place after the US Open.

Players must be in good standing as defined by the ATP as to avail of the reduced commitment.

[6] The ATP Cup will count as an additional event in a player's rankings breakdown.

[20] Note: Ranking points in italics indicate that a player did not qualify for (or used an exemption to skip) a Grand Slam or Masters 1000 event and substituted his next best result in its place.

Note: The US Open doubles points breakdown was the same as an ATP Masters 1000 because of a reduced 32-draw size.