Robbie Keane and the Los Angeles Galaxy sealed their place in the MLS Cup on away goals after their two-leg clash with the Seattle Sounders finished 2-2 on aggregate.

The Sounders clinched a 2-1 victory on Sunday night in this second leg of the Western Conference Championship, but it proved to be in vain as Los Angeles set up a clash against the New England Revolution.

Bruce Arena's men held a slender 1-0 advantage following last weekend's opening match, but that was wiped out by Brad Evans' 26th-minute strike.

Former Fulham and Tottenham forward Clint Dempsey struck six minutes later to put Seattle into the lead and give them hope of a first MLS Cup appearance.

But Brazilian midfielder Juninho scored what would prove to be a decisive away goal in the 54th minute and send the Galaxy into their ninth cup appearance.

Keane played 90 minutes for the Galaxy, up front alongside Gyasi Zardes, with the 34-year-old recording five efforts on goal, two on target.