D.C. United-Union Preview (The Associated Press)

D.C. United coach Ben Olsen saw one of his players score against his former team earlier this season and now is likely wary of it happening to him. Former longtime D.C. midfielder Chris Pontius is now with the rival Philadelphia Union, who are unbeaten at home as they try to keep United winless on the road Friday night. Pontius played his first seven seasons for D.C. before being traded to the Union in the offseason.