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| H (Match allé) | Columbus Crew | - | Toronto FC | 0:0 (0:0) | ||
| R (match retour) | Toronto FC | - | Columbus Crew | 1:0 (0:0) | ||
| H (Match allé): 22.11.2017 02:00 | R (match retour): 30.11.2017 01:30 | vainqueur: Toronto FC | ||||
| H (Match allé) | Houston Dynamo | - | Seattle Sounders | 0:2 (0:2) | ||
| R (match retour) | Seattle Sounders | - | Houston Dynamo | 3:0 (1:0) | ||
| H (Match allé): 22.11.2017 03:30 | R (match retour): 01.12.2017 04:30 | vainqueur: Seattle Sounders | ||||
