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| 1st(1st leg) | Chorrillo FC | - | Santos de Guápiles | 0:1 (0:1) | ||
| 2nd (2nd leg) | Santos de Guápiles | - | Chorrillo FC | 1:0 (1:0) | ||
| 1st(1st leg): 16/08/2017 03:00 | 2nd (2nd leg): 23/08/2017 03:00 | Winner: Santos de Guápiles | ||||
| 1st(1st leg) | CD Águila | - | Árabe Unido | 0:2 (0:0) | ||
| 2nd (2nd leg) | Árabe Unido | - | CD Águila | 0:1 (0:1) | ||
| 1st(1st leg): 17/08/2017 03:00 | 2nd (2nd leg): 24/08/2017 03:00 | Winner: Árabe Unido | ||||
| 1st(1st leg) | CD Walter Ferretti | - | Plaza Amador | 0:0 (0:0) | ||
| 2nd (2nd leg) | Plaza Amador | - | CD Walter Ferretti | 2:1 (1:1) | ||
| 1st(1st leg): 18/08/2017 01:00 | 2nd (2nd leg): 25/08/2017 01:00 | Winner: Plaza Amador | ||||
| 1st(1st leg) | Alianza | - | Olimpia | 1:0 (0:0) | ||
| 2nd (2nd leg) | Olimpia | - | Alianza | 3:1 (1:1) | ||
| 1st(1st leg): 18/08/2017 03:00 | 2nd (2nd leg): 25/08/2017 03:00 | Winner: Olimpia | ||||
