Robbie Keane and Gyasi Zardes scored in the opening 11 minutes as the LA Galaxy beat Portland 2-1 on Saturday to snap the Timbers' nine-game undefeated streak.
Zarek Valentin scored for the Timbers, who were stung when they lost veteran defender Nat Borchers to what appeared to be a left ankle injury late in the first half. Borchers was a key piece to the Timbers' team that won the MLS Cup last season.
It was the Galaxy's fourth straight victory in Major League Soccer play, and fifth overall. Los...
The LA Galaxy will host FC Dallas in the U.S. Open Cup semifinals.
In the other game, the Chicago Fire will travel to meet the New England Revolution, after all four teams advanced in the quarterfinals on Wednesday.
U.S. Soccer conducted the draw on Thursday morning. Both games will be televised on ESPN2 on Aug. 10.
The Fire will host the Sept. 21 final should they advance, but if the Revolution win they will play on the road at the LA-Dallas winner.