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| H | Defensa y Justicia | - | Banfield | 0:0 (0:0) | ||
| R | Banfield | - | Defensa y Justicia | 0:2 (0:0) | ||
| H: 22.08.2018 00:30 | R: 28.09.2018 02:15 | Sieger: Defensa y Justicia | ||||
| H | San Lorenzo | - | Nacional | 3:1 (2:0) | ||
| R | Nacional | - | San Lorenzo | 2:0 (1:0) | ||
| H: 23.08.2018 00:30 | R: 26.09.2018 02:15 | Sieger: Nacional | ||||
| H | LDU Quito | - | Deportivo Cali | 1:0 (1:0) | ||
| R | Deportivo Cali | - | LDU Quito | 3:1 (1:0, 1:0) i.E. | ||
| H: 23.08.2018 02:45 | R: 20.09.2018 02:45 | Sieger: Deportivo Cali | ||||
| H | Santa Fe | - | Millonarios | 0:0 (0:0) | ||
| R | Millonarios | - | Santa Fe | 3:5 (0:0, 0:0) i.E. | ||
| H: 19.09.2018 02:45 | R: 03.10.2018 02:45 | Sieger: Santa Fe | ||||
| H | Caracas FC | - | Athletico Paranaense | 0:2 (0:1) | ||
| R | Athletico Paranaense | - | Caracas FC | 2:1 (1:0) | ||
| H: 20.09.2018 00:30 | R: 04.10.2018 00:30 | Sieger: Athletico Paranaense | ||||
| H | Deportivo Cuenca | - | Fluminense RJ | 0:2 (0:1) | ||
| R | Fluminense RJ | - | Deportivo Cuenca | 2:0 (1:0) | ||
| H: 21.09.2018 00:30 | R: 05.10.2018 00:30 | Sieger: Fluminense RJ | ||||
| H | Bahia - BA | - | Botafogo - RJ | 2:1 (1:0) | ||
| R | Botafogo - RJ | - | Bahia - BA | 4:5 (2:1, 2:1) i.E. | ||
| H: 21.09.2018 02:45 | R: 04.10.2018 02:45 | Sieger: Bahia - BA | ||||
| H | Atlético Junior | - | Colón de Santa Fe | 1:0 (0:0) | ||
| R | Colón de Santa Fe | - | Atlético Junior | 1:1 (0:0) | ||
| H: 27.09.2018 02:15 | R: 05.10.2018 00:30 | Sieger: Atlético Junior | ||||
