Opponents don't usually go into Estadio Azteca and put Club America on its heels, but that's exactly what the Montreal Impact did in the first leg of the CONCACAF Champions League final.
Argentine midfielder Ignacio Piatti scored in the 16th minute, giving the Impact a 1-0 lead and a valuable away goal, stunning a crowd of more than 100,000.
Dominic Oduro set up Piatti with a pass from the right channel, which was expertly dummied by Dilly Duka. Piatti made no mistake with his effort from inside the box to beat goalkeeper Moises Munoz, though he was promptly yellow carded for removing his shirt in celebration
Piatti had a second chance later in the first half, opting to try to chip Munoz from the right, but his attempt crept just wide of the post, and it also appeared that he could've played Oduro through for an even better chance on goal.
Montreal is aiming to become the first MLS team to win the CONCACAF Champions League in its current format, while America is aiming to tie Cruz Azul with a sixth regional title. Real Salt Lake is the only other MLS team to appear in the final, falling to Monterrey in the 2011 championship.