Pachuca coach Enrique Meza said his club's inability to handle the pressure cost them a spot in Copa Libertadores.
Pachuca beat Universidad de Chile 2-1 but lost on a tiebreaker as the Chilean club's road goal sent them to Copa Libertadores.
Meza said his side was harried and unable to handle the pressure.
"(The result) was deserved because they did enough to win," Meza said about Universidad de Chile. "We had many opportunities in the first half but could not finish. We felt rushed and because of that we were off target."
Gerardo Rodriguez scored Pachuca's first goal on a penalty kick midway through the first half but the club squandered many opportunities during the run of play.
After Universidad de Chile's Marco Estrada leveled the match in the 58th minute on a free kick that Meza said resulted on "a play that I am not sure was a foul" Pachuca struggled get back into the game. It was not until Damian Alvarez scored four minutes from time that los Tuzos looked dangerous yet again. Christian Gimenez hit the post on a free kick deep in stoppage time but the result stood.
Meza, who led Pachuca to the 2006 Copa Sudamericana title, said losing to La U and failing to reach Copa Libertadores was one of the worst results in club history. Still, Meza said he did not feel as if his job was in danger because of the result.
"The road goal weighed heavily on us," Meza said. "We were unable to get a goal in Santiago but they were able to (score here)."