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| H | River Plate | - | Grêmio Porto Alegre | 0:1 (0:0) | ||
| R | Grêmio Porto Alegre | - | River Plate | 1:2 (1:0) | ||
| H: 24.10.2018 02:45 | R: 31.10.2018 01:45 | Sieger: River Plate | ||||
| H | Boca Juniors | - | Palmeiras | 2:0 (0:0) | ||
| R | Palmeiras | - | Boca Juniors | 2:2 (0:1) | ||
| H: 25.10.2018 02:45 | R: 01.11.2018 01:45 | Sieger: Boca Juniors | ||||
