Dom Dwyer scored in the seventh minute and Sporting Kansas City beat D.C. United 1-0 Friday night to move to the top of Major League Soccer's overall points standings.
The Black and Red has one more chance to claim a road victory when it plays Friday against Sporting Kansas City.
Philadelphia scored in the 90th minute to prevent D.C. United from picking up their fourth win of the season.
Like Chicago, United is facing another desperate team with the Union on Saturday. But in addition to playing spoiler they're focused on picking up some points.