*D.C. United will need to harness its emotions of short notice tonight against the Chicago Fire at RFK Stadium, just three days after an emotional and chaotic draw with the Philadelphia Union. My preview addresses United’s temperament and self-discipline as last-season pressure intensifies.

*The Capital Weather Gang has the promising game-day forecast.

*Local TV tonight: Comcast SportsNet at 7:30 p.m. ET.

Other MLS clubs in action tonight:

Toronto FC (20 points) at Columbus Crew (30), 7:30 p.m.

CONCACAF Champions League, Houston Dynamo at FAS (El Salvador), 10 p.m. (Fox Soccer)

*MLS announced three suspensions late Tuesday, but none involved United players stemming from Sunday’s chaotic events. However, with Branko Boskovic and Emiliano Dudar already serving suspensions tonight, further sanctions against them could be applied ahead of Saturday’s game at Montreal. MLS is also in no hurry to levy fines against Coach Ben Olsen and club president Kevin Payne for strongly worded comments about referee Mark Geiger.

*Will Maurice Edu join U.S. compatriot Geoff Cameron at Stoke City?

*Americans in Mexico on Tuesday:

Midfielder Alejandro Guido (age 18; profile here) made his Tijuana debut by playing 71 minutes in a 2-1 Copa MX victory over Celaya. Defender Greg Garza played all 90 for Tijuana.

*Reminder of a charity event, Celebration of Women’s Soccer, Saturday night at Maryland SoccerPlex: U.S. Olympic defender Becky Sauerbrunn is scheduled to attend but it’s unclear whether she will play. Other participants include Olympic alternate Lori Lindsey, Cat Whitehill, Allie Long, Nikki Marshall, Christie Welsh, Joanna Lohman and Lianne Sanderson.

*On Friday night, the SoccerPlex will host a men’s college match as Virginia faces Georgetown in the season opener for both sides. Connecticut, Akron and Maryland top Soccer America’s preseason poll.