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| U | Estudiantes | - | Grêmio Porto Alegre | 2:1 (2:1) | ||
| R | Grêmio Porto Alegre | - | Estudiantes | 5:3 (1:1, 2:1) d.p. | ||
| U: 08.08.2018 02:45 | R: 29.08.2018 02:45 | Winnaars: Grêmio Porto Alegre | ||||
| U | Boca Juniors | - | Libertad | 2:0 (2:0) | ||
| R | Libertad | - | Boca Juniors | 2:4 (2:2) | ||
| U: 09.08.2018 00:30 | R: 31.08.2018 00:30 | Winnaars: Boca Juniors | ||||
| U | Colo-Colo | - | Corinthians SP | 1:0 (1:0) | ||
| R | Corinthians SP | - | Colo-Colo | 2:1 (1:1) | ||
| U: 09.08.2018 02:45 | R: 30.08.2018 02:45 | Winnaars: Colo-Colo | ||||
| U | Flamengo RJ | - | Cruzeiro | 0:2 (0:1) | ||
| R | Cruzeiro | - | Flamengo RJ | 0:1 (0:0) | ||
| U: 09.08.2018 02:45 | R: 30.08.2018 02:45 | Winnaars: Cruzeiro | ||||
| U | Racing Club | - | River Plate | 0:0 (0:0) | ||
| R | River Plate | - | Racing Club | 3:0 (2:0) | ||
| U: 10.08.2018 00:30 | R: 30.08.2018 00:30 | Winnaars: River Plate | ||||
| U | Atlético Tucumán | - | Atlético Nacional | 2:0 (1:0) | ||
| R | Atlético Nacional | - | Atlético Tucumán | 1:0 (1:0) | ||
| U: 10.08.2018 02:45 | R: 29.08.2018 02:45 | Winnaars: Atlético Tucumán | ||||
| U | Cerro Porteño | - | Palmeiras | 0:2 (0:0) | ||
| R | Palmeiras | - | Cerro Porteño | 0:1 (0:0) | ||
| U: 10.08.2018 02:45 | R: 31.08.2018 02:45 | Winnaars: Palmeiras | ||||
| U | Independiente | - | Santos FC | 3:0 (0:0) Toeg. | ||
| R | Santos FC | - | Independiente | 0:0 (0:0) | ||
| U: 22.08.2018 02:45 | R: 29.08.2018 00:30 | Winnaars: Independiente | ||||
