The quarterfinals will consist of the top three teams from Group A, which features six teams, and the top two teams from the remaining five groups. In addition, the three remaining teams with the most points will advance.
The knockout rounds will be played July 25-28, the quarterfinals July 30-Aug. 1, the semifinals Aug. 5-6 and the championship game Aug. 11.
The tournament champion will receive a berth into the 2021 Champions League.
Cincinnati includes former Atlanta United players Greg Garza and Brandon Vazquez. Cincinnati is 0-2-0 this season, with a 3-2 loss at the Red Bulls and 2-1 loss at Mercedes-Benz Stadium. It has a new coach, Jaap Stam.
Columbus features former Atlanta United player Darlington Nagbe. It is 1-0-1 this season with a 1-0 win against NYCFC and 1-1 draw at Seattle.
The Red Bulls are 1-0-1 this season, with the win against Cincinnati and a 1-1 draw at Real Salt Lake.
The Five Stripes have yet to defeat the Red Bulls in a regular-season game.
If Atlanta United wins its group, its first knockout round match will come July 28 against the runner-up in Group D, which consists of Colorado, Minnesota, Real Salt Lake and Sporting KC. If Atlanta United is runner-up, its match will take place July 28 against the winner of Group F, which consists of Houston, L.A. Galaxy, LAFC and Portland.
If Atlanta United moves to the knockout round as a wild card, it would play July 25 against the winner of Group A, which consists of Chicago, Miami, Nashville, NYCFC, Orlando and Philadelphia, or it will play July 26 against the winner of Group D.