If FC Dallas's breakthrough for MLS last week was tempered because of Pumas's player selection, critics will need to find another excuse to explain what happened in Monterrey on Tuesday.

That's when the Seattle Sounders extended Major League Soccer's winning streak in Mexico to two games, beating the CONCACAF Champions League holders 1-0 at the Tecnologico. A 38th minute goal from Uruguayan Alvaro Fernandez was enough to hand Monterrey their first home loss in Champions League play.

Major League Soccer teams had been winless in 24 previous trips to Mexico before FC Dallas's 1-0 win last Wednesday at the Stadio Olimpico in Mexico City. By the same score, Seattle showed Monterrey and Mexico that MLS's breakthrough was no fluke.

The defending champion Rayados started most of their first choice players, something Pumas declined to do last week against Dallas. Stars such as Humberto Suazo (returning from injury), Algo de Nigris, Neri Cardozo and Jonathan Orozco were all in Victor Manuel Vucetich's starting lineup, part of a team that outshot Seattle 11-5 on the night while maintaining 64 percent possession.

But the only number that mattered broke in the visitor's favor, with Fernandez scoring off a pass from Pat Noonan in the 38th minute, finishing high into Orozco's net from near the edge of the six yard box.

The win was Seattle's first in three attempts against Monterrey, the two previous meetings coming in last year's group stage. Then, Seattle lost 2-0 at home and were defeated 3-2 in Monterrey despite carrying a two goal lead into half time.

With the victory, Seattle sits top of Group D with six points through two rounds.