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| U | Árabe Unido | - | Arnett Gardens | 3:0 (0:0) | ||
| R | Arnett Gardens | - | Árabe Unido | 2:1 (1:1) | ||
| U: 01.08.2018 02:00 | R: 10.08.2018 04:00 | Winnaars: Árabe Unido | ||||
| U | Motagua | - | Belmopan Bandits | 2:0 (0:0) | ||
| R | Belmopan Bandits | - | Motagua | 0:1 (0:0) | ||
| U: 01.08.2018 04:00 | R: 08.08.2018 02:00 | Winnaars: Motagua | ||||
| U | FAS | - | Municipal Pérez Zeledón | 2:1 (0:1) | ||
| R | Municipal Pérez Zeledón | - | FAS | 1:1 (0:0) | ||
| U: 01.08.2018 04:00 | R: 08.08.2018 04:00 | Winnaars: FAS | ||||
| U | Club Franciscain | - | CD Walter Ferretti | 1:0 (0:0) | ||
| R | CD Walter Ferretti | - | Club Franciscain | 4:1 (0:0, 1:0) d.p. | ||
| U: 02.08.2018 02:00 | R: 09.08.2018 02:00 | Winnaars: CD Walter Ferretti | ||||
| U | Diriangén FC | - | UD Universitario | 0:4 (0:0) | ||
| R | UD Universitario | - | Diriangén FC | 3:1 (2:0) | ||
| U: 02.08.2018 02:00 | R: 08.08.2018 02:00 | Winnaars: UD Universitario | ||||
| U | Santos de Guápiles | - | Portmore United | 1:2 (0:2) | ||
| R | Portmore United | - | Santos de Guápiles | 7:6 (1:2, 1:2) d.p. | ||
| U: 02.08.2018 04:00 | R: 10.08.2018 01:30 | Winnaars: Portmore United | ||||
| U | Tauro FC | - | Real España | 1:0 (0:0) | ||
| R | Real España | - | Tauro FC | 1:1 (1:1) | ||
| U: 03.08.2018 02:00 | R: 10.08.2018 04:00 | Winnaars: Tauro FC | ||||
| U | CS Herediano | - | Santa Tecla FC | 1:0 (1:0) | ||
| R | Santa Tecla FC | - | CS Herediano | 2:1 (2:1) | ||
| U: 03.08.2018 04:00 | R: 09.08.2018 04:00 | Winnaars: CS Herediano | ||||
