American nation to send a team to the 2011–12 CONCACAF Champions League quarterfinals. Mexico (MEX): Because Santos Laguna, the 2011 Apertura runners-up, also won the 2012 Clausura, they relinquished the spot allocated to the Apertura runners-up to Guadalajara, the team with the best regular season record in the Apertura, based on the formula outlined by the Mexican Football Federation. United States (USA): Because the Los Angeles Galaxy won both the 2011 MLS Supporters' Shield and the 2011 MLS Cup, Seattle Sounders FC, the 2011 MLS Supporters' Shield runners-up, was also placed in Pot A, and as they also won the 2011 U.S. Open Cup, a CCL berth became available and went to Real Salt Lake, the 2011 MLS Supporters' Shield third place. Format On January 12, 2012, CONCACAF announced that the 2012–13 tournament would be played under a different format than previous editions, where the preliminary round is eliminated and all qualified teams enter the group stage. In the group stage, the 24 teams are drawn into eight groups of three, with each group containing one team from each of the three pots. The allocation of teams into pots are based on their national association and qualifying berth. Teams from the same association (excluding "wildcard" teams which replace a team from another association) cannot be drawn with each other in the group stage, and each group is guaranteed to contain a team from either the United States or Mexico, meaning U.S. and Mexican teams cannot play each other in the group stage. Each group is played on a home-and-away round-robin basis. The winners of each group advance to the championship stage. In the championship stage, the eight teams play a single-elimination tournament. Each tie is played on a home-and-away two-legged basis. The away goals rule is used if the aggregate score is level after normal time of the second leg, but not after extra time, and so a tie is decided by penalty shoot-out if the aggregate score is level after extra time of the second leg. Unlike previous years where a second draw was conducted to set the pairings for the championship stage, the bracket is determined by the teams' record in the group stage. The quarterfinals match the team with the best record against the team with the worst record, while the second-best team faces the seventh-best, third against sixth and fourth against fifth. The top four teams