Pumas' 1-0 advantage over Cruz Azul heading into the second leg of their semifinal series at Estadio Azul on Tuesday, but it was like taking a pellet gun to the front lines.
Cruz Azul steamrolled Pumas, scoring five goals on their crosstown rivals in a 5-0 rout. La Maquina scored for goals in the final 16 minutes of the game.
Pumas tried to keep their slim advantage intact and tried to ride that 90 minutes to the final. The tactic worked briefly but before the half was out, Cruz Azul found some success.
Cruz Azul leveled the aggregate scoreline in the 37th minute. Adrian Cortes raced down the left flank and found Maxi Biancucchi, who slipped the ball right back onto Cortes' path. Cortes centered the ball and three Cruz Azul attackers in front of the goal. But it was Christian Riveros who got his foot to the ball.
Pumas' defense held serve and tried to fend off Cruz Azul's attack. It nearly worked too, as Pumas held off Cruz Azul for the first 28 minutes of the second half.
But the flood gates opened over the final 16-plus minutes.
In the 74th minute, Alejandro Vela knocked a corner kick onto the goal and Horacio Cervantes leapt and knocked the header past Sergio Bernal and into the back of the net.
Cruz Azul had the 2-1 aggregate lead and their ticket to the CONCACAF Champions League final in hand but wanted to make sure Pumas didn't get a sniff of the series once more.
Two minutes later, Pumas' Dario Veron was sent off after a foul on Vela led to his second yellow card of the game.
Cortes stepped to take the penalty kick and rifled a shot over the wall and into the back of the net.
Rogelio Chavez got the club's fourth goal after knocking in a long rebound. Pumas' Sergio Bernal made a mess of a clearance. Pumas' Luis Fuentes tried to clear the ball but it bounced to Emanuel Villa, who sent a shot towards an empty net. The ball caromed off the post, went to Chavez who slipped it back towards the goal, easily hitting the back of the net.
Gerardo Lugo closed out the scoring in stoppage time when he ripped a 20-yard laser past Bernal and into the back of the net.
Cruz Azul had their rout complete and will await the winner of Toluca-Pachuca in the CONCACAF Champions League final.
Visit Goal.com's Mexico page for more coverage of Mexican football.