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| 1st(1st leg) | Atlanta United FC | - | New York RB | 3:0 (1:0) | ||
| 2nd (2nd leg) | New York RB | - | Atlanta United FC | 1:0 (0:0) | ||
| 1st(1st leg): 25/11/2018 22:00 | 2nd (2nd leg): 30/11/2018 00:30 | Winner: Atlanta United FC | ||||
| 1st(1st leg) | Portland Timbers | - | Sporting Kansas City | 0:0 (0:0) | ||
| 2nd (2nd leg) | Sporting Kansas City | - | Portland Timbers | 2:3 (1:0) | ||
| 1st(1st leg): 26/11/2018 00:30 | 2nd (2nd leg): 30/11/2018 02:30 | Winner: Portland Timbers | ||||
