U.S. Open Cup semifinals: Your Running Commentary

By night's end, the final of the 2011 U.S. Open Cup will be set.

The Chicago Fire and Richmond Kickers square off in a battle of unlikely semifinal participants who are both looking to maintain their surprising runs (8:30 p.m., live stream on Chicago-Fire.com). The Kickers are the last non-MLS team remaining in the field and will look to beat their third straight MLS opponent, although the Fire enter the match in good form as winners of two straight games.

In the nightcap, two MLS Western Conference powers do battle for a spot in the final as the Seattle Sounders host FC Dallas (10 p.m., live stream on SoundersFC.com). Both teams have been coping with schedule congestion, but both will be amped up in hopes of getting a step closer to potentially sealing a place in the 2012-2013 CONCACAF Champions League.

If you will be watching Tuesday's U.S. Open Cup semifinals, please feel free to share any thoughts, opinions and some play-by-play in the comments section below. Enjoy the action.