D.C. United vs. Philadelphia Union

What: U.S. Open Cup qualifier.

Where: Maryland SoccerPlex, Boyds.

When: 7:30 p.m.

Tickets: $25 (includes parking).

Outlook: United will need to win three games against MLS opponents to qualify for the 97-year-old tournament, which features clubs from various levels of American soccer. With a victory Wednesday, United would play the New England Revolution on April 26 at the SoccerPlex. Eight MLS teams received automatic berths in the tournament proper. With this match sandwiched between league games, United is expected to rest several regulars. Goalkeeper Bill Hamid will probably make his 2011 debut after recovering from a shoulder injury and regaining his form in two reserve games. He served as Pat Onstad’s backup in the past two regular season matches. Rookie defender Ethan White (University of Maryland) seems likely to play in his first consequential match. Midfielders Stephen King and Fred and forward Joseph Ngwenya are also in the mix. Forward Charlie Davies (groin) did not practice Tuesday and is not expected to play. Defender Jed Zayner (hamstring) and midfielder Clyde Simms (calf) returned to training but might be held out until Saturday. United (1-2 in MLS) is coming off a 4-1 away loss to the Colorado Rapids on Sunday. The Union, a second-year club guided by former United coach Peter Nowak, lost Saturday at Los Angeles, 1-0, its first defeat after two victories.

— Steven Goff