CONCACAF Champions League: D.C. United vs. Marathon
What: Fourth of six matches for each club in the group stage of the CONCACAF Champions League, an international tournament to decide the best team in North and Central America and the Caribbean.
Where: RFK Stadium.
When: 8 p.m.
TV: Fox Soccer Channel.
Radio: WZAA (1050 AM), English; WXTR (730 AM), Spanish.
Standings: Toluca (Mexico) 4-0-0, 12 points; Marathon (Honduras) 2-1-0, six; United 1-2-0, three; San Juan Jabloteh (Trinidad and Tobago) 0-4-0, none. Two teams will advance to next year's quarterfinals.