Clausura 2009 was disastrous for the Warriors; coach Daniel Guzman was dismissed and replaced by Sergio Bueno, and the club's fortunes improved somewhat. In the CONCACAF Champions League quarter-finals against the Montreal Impact in Montreal's Olympic Stadium before a crowd of 55,571, the Impact surprised and won 2–0. Apertura 2009 opened the Nuevo Estadio Corona; Bueno was dismissed and replaced by Ruben Omar Romano.