One half of the 2019 MLS Cup final is set.
Now the question is whether they will travel to face Atlanta United or come home to host Toronto FC, who meet in Wednesday's Eastern Conference Final (8 pm ET | FS1, FOX Deportes in US | TSN1/4, TVAS in Canada).
Here's how the Sounders stack up in each potential championship fixture.
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2019 MLS Cup
Option 1: Atlanta United vs. Seattle Sounders
Nov. 10, Mercedes-Benz Stadium (3 pm ET | ABC, Univision, TUDN, TSN, TVAS)
Seattle has never lost to Atlanta in their brief, three-match series history, but all of those regular season encounters have been tightly contested.
It was an important win for the home side, their third in a four-match stretch after a previous run of struggles, in which coach Brian Schmetzer's side won only two of 10 games.
Two years prior, both teams were held to an uncharacteristic stalemate in a 0-0 draw also at CenturyLink field in their first competitive meeting.
A year later, honors were even again in Seattle's only trip to Atlanta to date, this time a 1-1 draw. Nicolas Lodeiro scored from the penalty spot for the Sounders just before half. Just after the break, Josef Martinez scored the first of his two goals all-time against Seattle.
One curious note about this series: Josef Martinez is the only Atlanta player to have scored against Seattle while wearing a Five Stripes uniform.
Option 2: Seattle Sounders vs. Toronto FC
Nov. 10, CenturyLink Field (3 pm ET | ABC, Univision, TUDN, TSN, TVAS)
Seattle and Toronto could meet for a third time in MLS Cup in four years, which would be the only time that's ever happened in MLS. Only one other set of opponents have met three times in MLS Cup; The LA Galaxy won all of those in their championship meetings with the New England Revolution between 2005 and 2014.
As for this encounter, the Rave Green and the Reds have already split honors from their two previous MLS Cup matches, both played at BMO Field. Seattle grinded out their first and only MLS Cup win in 2016, taking the title on penalties after a scoreless draw. Toronto got revenge with a 2-0 victory to take their first Philip F. Anschutz trophy the following year.
In the overall series, however, Seattle has had the decided advantage, winning nine of their 14 regular season meetings. That includes a 3-2 win at CenturyLink Field back on April 13, in which Will Bruin and Jozy Altidore each struck for a brace. In Bruin's case, it was the only two MLS goals he scored this year.
Toronto have only won in two of their eight all-time trips to Seattle, but both of those have come since 2014. The last? A 1-0 victory decided by Altidore's penalty on May 6, 2017 that was billed as a small measure of revenge for the Sounders' 2016 MLS Cup triumph.