Matchday 3 of the MLS season gets underway Friday with the Philadelphia Union taking on FC Dallas.

This will be followed by five games Saturday. The New England Revolution host the Montreal Impact, a team fresh off a 2-0 win against Alajuelense in the first leg of its CONCACAF Champions League tie.

Other marquee matches that day include Sporting Kansas City against the Portland Timbers at Sporting Park. The LA Galaxy welcome the Houston Dynamo to cap off the night.

The New York Red Bulls face their fierce rival D.C. United in the Red Bulls' home opener Sunday. The penultimate match of the weekend pits the San Jose Earthquakes against the Chicago Fire as they open Avaya Stadium in the Bay Area.

Here are the keys to every MLS match this weekend.

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