The host will attempt to move into a tie for the top spot in the Eastern Conference, while its guests look to re-enter postseason contention.
The Fire haven't been able to provide many fireworks, entering the match on a five-match streak without a win, though a 1-1 draw with Toronto last time out may stoke Frank Yallop's men. The opposite number, Sporting, comes into Sunday's game after consecutive victories and could join D.C. United atop the Eastern Conference with the full three points.
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Sporting has kept its progress up without World Cup stars Matt Besler and Graham Zusi, but both players are reportedly transfer targets for European teams. Manager Peter Vermes said he wasn't sure whether or not the United States internationals will be selected for the match Sunday but did say he was confident the MLS Cup champions could keep the players on their books.
Midfielder Benny Feilhaber has also missed Sporting's most recent matches with a shoulder injury. Chicago will be without forward Quincy Amarikwa because of yellow card accumulation.