Neither team was happy with the officiating. Montreal thought Osvaldo Martinez should have been sent off
for taking down Oduro breaking in alone on goal in the 44th minute. Only a yellow card was issued by Honduran Henry Rodriguez.
Earlier in the first half, Michael Arroyo appeared to have equalized for America but was whistled for offside. Replays showed left back Danny Toia had kept Arroyo onside.
Klopas was upset with the decision not to send off Martinez and also the yellow card that will keep Bush out of the second leg.
"For me," he said, "it was incredible that again, in a game like this in a final, instead of the players having to dictate the game and the fans enjoying the game, we have to talk about the referees. We're in the 44th minute, clearly a breakaway that's not called for a red card."
Klopas couldn't understand Rodriguez's decision to caution Bush. "He gets pushed down," he said. "He gets a yellow card."
Of concern for Montreal will also be the injury to Belgian center back Laurent Ciman, who had another huge game in the middle of the backline but
had to be helped off the field at the end of the game. Camara, subbing for the injured right back Victor Cabrera, earlier left the game with an injury.
But injury issues are nothing new to the Impact, who lost Justin Mapp and rookie star Cameron Porter after the quarterfinals when they were injured in MLS play.
Off for the third week since the start of the MLS season, Montreal will at least get a chance to rest for next Wednesday. America has no such luck. It plays Chivas de Guadalajara in the Super Clasico Sunday in Guadalajara.
April 22 in Mexico City
Club America 1 Montreal Impact 1. Goals: Peralta 89; Piatti 16.
Montreal Impact -- Bush; Camara (Miller 66), Soumare, Ciman, Toia; Reo-Coker (Bernier 76), Mallace, Romero, Piatti, Duka (Tissot 71); Oduro.
Club America -- Munoz; Pimentel, Samudio, Aguilar, Pellerano (Guerrero 70), Quintero, Martinez (Peralta 46), Sambueza; Benedetto (Zuniga 80), Arroyo.