The ATP Cup was an international outdoor hard court men's tennis team tournament, which ran from 2020 to 2022.

On 2 July 2018, ATP director Chris Kermode announced that he had plans to organise a men's team tennis tournament in response to the Davis Cup changing their format six months earlier.

[9][10] In 2021, the tournament was deferred several weeks, and moved to Melbourne Park with 12 teams, due to the restrictions on domestic travel in Australia stemming from the COVID-19 pandemic.

Following the 2022 Russian invasion of Ukraine, the ITF barred Russia and Belarus from competing at the tournament.

The winner from each group was joined by the two best second placed teams in the quarterfinals of the tournament for three knock-out rounds, culminating in the champion being crowned.