COLUMBUS CREW AT SOUNDERS FC 7 p.m. Tuesday, Qwest FieldTV: Fox Soccer Channel. RADIO: 97.3 FM.ABOUT U.S. OPEN CUP: The competition dates to 1914, making it the oldest soccer tournament in the United States. It is a single-elimination competition involving amateur and professional clubs across all levels of U.S. Soccer. Seattle is the defending champion. Head to head: Seattle leads, 2-0-2. This season, the clubs played to a 1-1 draw at Qwest Field on May 1, and Seattle won 4-0 at Columbus on Sept. 18.KASEY KELLER ON THE GAME: “Cup finals are cup finals. You work hard. You have multiple games to get in there. It’s a knockout stage. … We’ve proven over the last two years with the strength of our squad that we can make changes, we can win games; and it’s going to be a fun night.”NOTES: The Open Cup is Sounders FC’s only major trophy. Columbus has won a U.S. Open Cup, one MLS Cup and three Supporters Shields. … In this season’s MLS standings, Columbus is 13-7-7, Seattle is 12-9-6. … Sounders FC is trying to become the first MLS club to defend its U.S. Open Cup title. The last team to repeat as champion was New York Pancyprian Freedom, which did so in 1983. … Cup rules limit each team to five foreign players. Schmid would not reveal which two international players from his normal MLS roster would sit out. … Seattle forward Nate Jaqua has scored five of Seattle’s six goals in Open Cup play. He was selected the tournament’s outstanding player in both the quarterfinal and semifinal rounds. … The Sounders expect reserve goalkeeper Terry Boss to return from duty with the Puerto Rican national team in time to be available for the final. … Existing ticket sales of 28,800 as of Monday afternoon assure that this will be the biggest crowd ever to attend a U.S. Open Cup final. The existing record is 21,583 for the 1929 final. Tickets remain available. … The Open Cup winner is expected to be awarded a spot in the 2011 CONCACAF Champions League. … There must be a result. If the game is tied at the end of regulation, there will be 30 minutes of extra time. If the score remains even, the championship will be determined by penalty kicks. … The 7 p.m. kickoff is correct. The game was moved forward one hour from the originally announced start.NEXT: The Sounders return to MLS play 5:30 p.m. Saturday at Kansas City.