HARRISON, NJ - JULY 23: Roy Miller #7 of the New York Red Bulls heads the ball away from Brek Shea #20 of FC Dallas during the game at Red Bull Arena on July 23, 2011 in Harrison, New Jersey. (Photo by Andy Marlin/Getty Images)
The winner affects the Philadelphia Union's start time on Sunday afternoon, along with the playoff match ups after the Wild Card round.
If the Red Bulls win, the Union will kickoff at 5 pm and New York will head to California to take on MLS' Supporters Shield winner, the Los Angeles. If Dallas wins, then the Union will either kick off at 4 pm or 6 pm, with the latter happening if the Colorado Rapids lose to the Columbus Crew in tomorrow night's Wild Card game.
Here are the starting line ups for the two teams playing tonight: