At the 2008 season's end, the top three teams of each conference made the playoffs; in addition the clubs with the next two highest point totals, regardless of conference, were added to the playoffs. In the first round of this knockout tournament, aggregate goals over two matches determined the winners; the Conference Championships were one match each, with the winner of each conference advancing to MLS Cup. In all rounds, the tie-breaking method was two 15-minute periods of overtime, followed by penalty kicks if necessary.