NEW YORK - The Preliminary Round will be eliminated from next season's CONCACAF Champions League under a format change announced Thursday by the confederation.The four-year-old competition will remain a 24-club tournament, but instead of an initial knockout phase of 16 teams, all qualifiers will proceed to a main stage of eight, three-team groups, from which only the winners will advance to the quarterfinals.The knockout, or Championship Round, will not be altered.No team will face another club from the same country in the group stage - except in the case of a reallocated or "wild card" berth, and each group will contain either a Mexican or U.S. club. "This new format will streamline the first phase of the competition," said Ted Howard, CONCACAF's acting general secretary. "It will alleviate schedule congestion on both domestic and international calendars."The competition will begin as previously planned during the week of July 31, resuming with games the weeks of August 21, August 28, September 18, September 25 and October 23. Eight games will be contested each of those weeks as previously on Tuesday, Wednesday and Thursday.With each team playing four matches instead of six, and the elimination of the Preliminary Round, the initial phases of the competition will be pared from 64 to 48 games.The top two teams from the United States and Mexico along with the top qualified sides from Costa Rica, Guatemala, Honduras and Panama will be placed in the top seeded group for purposes of the draw. The second two teams from the United States and Mexico, Canada's entrant as well a the top team from El Salvador and the second teams from Costa Rica and Honduras will be placed in a second group of seeds.The three Caribbean teams, as well as the qualifiers from Belize and Nicaragua and the second teams from El Salvador, Guatemala and Panama will be placed in a final group.Quarterfinal legs will be played March 5-7 and March 12-14, with the semifinals April 2-4 and April 9-11. The finals are slated for April 24 and May 1.