[MLS PLAYOFFS: Western Conference] As if it was scripted, the Western Conference’s fiercest rivals wound up facing each other in the first phase thatconcludes Thursday. The fifth and final Cascadia Cup clash of the season pairs conference champion Portland against bitter rival Seattle, which trails from the first leg, 2-1, and must somehow prevailat Jeld-Wen Field to advance. The winner faces either Real Salt Lake or the Los Angeles Galaxy, which takes the field at Rio Tinto Stadium leading, 1-0.

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