Club America stunned Tigres with two second half goals to take full control of their CONCACAF Champion League Final tie.
The Liga MX champions Tigres now face an uphill task at the Estadio Azteca after losing 2-0 at home in the first leg.
Tigres should have led in the first half through Javier Aquino who, with only the goalkeeper to beat, placed his effort well above the crossbar following a great pass from Israel Jimenez.
Las Aguilas, though, were a threat on the counter and after a brilliant build-up from Osvaldo Martinez, Dario Benedetto headed home to give his side the lead.