Some basics on tonight's match:
SANTOS LAGUNA AT SOUNDERS FC7 p.m., CenturyLink Field.TV: Fox Soccer. RADIO: 97.3 FM.NOTES: This is the first game of a home-and-away, aggregate-score semifinal series in CONCACAF Champions League, the club championship of North America, Central America and the Caribbean. Road goals count as the first tie-breaker. The winner will advance to the final against the winner of the series between Los Angeles and two-time defending champion Monterrey. … Seattle and Santos reached the knockout rounds by sweeping their four matches in group stage. In the quarterfinals, Seattle advanced with 3-2 aggregate win over Tigres, while Santos came from behind to eliminate Houston, 3-1. … The Sounders and Galaxy are the third and fourth MLS clubs to reach the CCL semifinals, joining Toronto and Real Salt Lake. Only RSL has reached the final. … Marcus Hahnemann will make his second career start for Seattle with No. 1 goalkeeper Michael Gspurning out due to yellow-card accumulation. … The Sounders will be without reserve forward David Estrada (eye), while the availability of starting forwards Eddie Johnson (toe) and Obafemi Martins (leg) was uncertain. … Seattle is last in the MLS Western Conference with a 0-3-1 record. Santos is fourth in Liga MX at 6-2-4. … Approximately 17,900 tickets had been sold as of Monday afternoon. … Seattle Reign FC players and coaches will appear at tables located at the northwest and east concourses beginning at 6 p.m.ABOUT SANTOS: The club was founded in 1983 and is located in Torreon, Mexico. This is Santos’ fourth CCL appearance, and it reached the final in 2012. Santos has won the Mexican Primera Division four times, Interliga once and Copa Independencia once. Key players are forwards Herculez Gomez and Oribe Peralta and goalkeeper Oswaldo Sanchez. The club features 11 present or former international players, including seven Mexican internationals. Seattle and Santos split two meetings in the 2012 CCL quarterfinals with Santos advancing on aggregate score, 7-3. The Sounders won that opening leg in Seattle, 2-1.QUOTABLE: “Herculez, Peralta and (Darwin) Quintero are very active up front. The three of them have pretty good freedom to go where they want to go, but they also do a good job of balancing each other off, so that makes them a dangerous team because they’re very flexible in how they attack.” Sounders coach Sigi Schmid on SantosNEXT: The series resolves April 9 at Estadio Corona in Torreon.