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| H | Esteghlal | - | Al Sadd | 1:3 (1:0) | ||
| R | Al Sadd | - | Esteghlal | 2:2 (1:1) | ||
| H: 27.08.2018 18:00 | R: 17.09.2018 18:00 | Sieger: Al Sadd | ||||
| H | Kashima Antlers | - | Tianjin Quanjian FC | 2:0 (0:0) | ||
| R | Tianjin Quanjian FC | - | Kashima Antlers | 0:3 (0:2) | ||
| H: 28.08.2018 12:00 | R: 18.09.2018 13:30 | Sieger: Kashima Antlers | ||||
| H | Al Duhail SC | - | Persepolis | 1:0 (1:0) | ||
| R | Persepolis | - | Al Duhail SC | 3:1 (0:1) | ||
| H: 28.08.2018 17:30 | R: 17.09.2018 16:00 | Sieger: Persepolis | ||||
| H | Jeonbuk FC | - | Suwon Bluewings | 0:3 (0:0) | ||
| R | Suwon Bluewings | - | Jeonbuk FC | 4:2 (0:1, 0:3, 0:3) i.E. | ||
| H: 29.08.2018 12:00 | R: 19.09.2018 12:00 | Sieger: Suwon Bluewings | ||||
