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| H | New York RB | - | D.C. United | 0:1 (0:0) | ||
| R | D.C. United | - | New York RB | 1:1 (0:0) | ||
| H: 21.10.2006 20:00 | R: 30.10.2006 00:00 | Sieger: D.C. United | ||||
| H | Colorado Rapids | - | FC Dallas | 1:2 (1:1) | ||
| R | FC Dallas | - | Colorado Rapids | 4:5 (0:0, 1:2, 2:3) i.E. | ||
| H: 22.10.2006 03:00 | R: 29.10.2006 02:30 | Sieger: Colorado Rapids | ||||
| H | Chicago Fire | - | New England Revolution | 1:0 (1:0) | ||
| R | New England Revolution | - | Chicago Fire | 4:2 (1:1, 2:1, 2:1) i.E. | ||
| H: 22.10.2006 19:00 | R: 29.10.2006 01:30 | Sieger: New England Revolution | ||||
| H | CD Chivas | - | Houston Dynamo | 2:1 (1:0) | ||
| R | Houston Dynamo | - | CD Chivas | 2:0 (0:0) | ||
| H: 22.10.2006 22:00 | R: 30.10.2006 02:00 | Sieger: Houston Dynamo | ||||
