8.54pmSo one of Houston's scorers from the last leg Will Bruin keeps his place in the XI, but another Andre Hinault is out.
8.56pmDC will be looking for more of the same from Nicholas DeLeon if they are to overcome the two-goal deficit tonight.
8.58pmA few minutes away from kickoff here and I think it's time to make a prediction. I'm going 1-1. Although I can see DC winning, I don't think they have it in them to go through.
9.07pmSlight delay to kickoff from what I can tell. Remember that LA Galaxy and Seattle Sounders follows this game, with LA 3-0 up in that.
9.12pmJust trying to find what the delay is.. I'm sure we'll be underway soon! Stay tuned.
9.14pmDC coach Ben Olsen said in the build-up to this game that his side are not out of it. He;s right, but they'll need to defend better than last time. If Houston make it 4-1 on aggregate I see no way back.
34 minBrad Davis does well to get to the byline. He cuts it back for Garcia who has made a run from the midfield and it's 4-1 on aggregate. Very hard now for the hosts.
36 minThe goal was somewhat against the run of play, but United haven't exactly dominated. They created more chances, but the danger of needing goals is you can get caught on the beak and that's exactly what Houston have done.
38 minFree-kick from 45 yards here for DC... Kitchen meets it but his header goes over the bar.
40 minChance for Houston! Garcia was left unmarked on the edge of the box but the pass from Bruin was behind him. A better ball and it was 2-0 there.
43 minUnited looking to get as many balls in the box as they can but Taylor is clearing everything currently.
44 minJust over a minute of the half left, with a 4-1 advantage you can't look beyond last year's Conference champions here.
45 minSantos is flagged offside. He was, by many yards. One minute added on...
45+1 minPoor delivery from Russell after being played through by Boskovic, and that's the last action.
10.10pmSo Dynamo hold a 4-1 aggregate lead, with DC having one half left to score three goals to force extra time.
10.11pmThe home side have probably had more of the chances. They've certainly had more possession, but Houston have played the perfect game on the break so far to extend their overall lead.
10.18pmWill Olsen risk Dwayne De Rosario at half-time? He's far from match-fit, but it's desperate now for the hosts.
10.22pmAnother few minutes and the game will be back underway. I have to say Houston's centre-backs Boswell and Taylor have been immaculate since the first 10-15 minutes, in which Santos and Pajoy were linking up quite well.
10.23pmDe Rosario does not come on just yet. Olsen will be hoping his side are within two goals at least by the time his star man comes on. Saragosa comes off however, for Lewis Neal.
46 minSecond-half time. Can DC produce a miracle here?
47 minI'm expecting high tempo from United now, with space opening up for Houston. Next goal is crucial. If it goes to the away team there's no hope for DC. If they get it... well, who knows?
48 minChance for DC! What a chance! Pajoy meets a Korb cross and it falls to Russell from the edge of the six-yard box. However he skies it.
50 minBoskovic is playing slightly further up with the introduction of Neal. He'll need to be at his creative best for United to get back in this.
50 minDavis almost gets on the end of a Bruin cut-back, as Houston look to break.
52 minHouston are defending in numbers and Bruin then has another chance to break. However Dudar defends very well one-on-one. Neal then blazes one over from some way out for the hosts.
55 minIt's something of a 5-4-1 for the visitors, while DC have often just got two or three players in their own half. Likely to be one-way traffic in the next 35 minutes.
56 minChance for DC! A Korb cross falls to Pajoy, who looks to work space. His eventual shot is blocked and it was really good defending. It's Pajoy's last action, he's coming off for Salihi.
57 minChance for Houston! Davis finds Bruin and for a moment it's two-on-one, but Dudar closes the angle well and the danger has gone.
60 minNearly an hour gone and DC aren't looking likely to get even one back. De Rosario is looking likely to come on. Reports suggest he's to come on for Dudar in a going-for-broke change by Olsen.
62 minChance for DC! Good work for the hosts and Boskovic has a chance to shoot from the edge of the box but it's blocked to Hall. And here comes De Rosario! It is indeed Dudar who comes off.
63 minSurely not even he can lift his side to three goals in just over 25 minutes? Stranger things have happened in football, though.
64 minBruin wastes a good chance for the visitors by delaying a cut-back until Clark was offside.
65 minSubstitution for Houston Clark was injured in that last move, tackled by De Rosario of all people. He's coming off for Camargo.
68 minChance for DC! Santos flicks on to Salihi, whose first touch is poor and Hall collects.
68 minChance for DC! And he blows it again! This time he's wide in the box and cuts inside rather than shoot on his right foot. It's blocked for a corner and nothing comes of it.
69 minChance for DC! Another one goes begging. This time De Rosario finds Santos and he heads over from a good position. They can't keep blowing these!
71 minChance for DC! Not as good a chance that for Salihi from an over-the-shoulder volley. He catches it well but Hall holds. Less than 20 minutes for the hosts.
72 minChance for Houston! The visitors should have wrapped it up. Kandji is through on goal and shoots early, but puts it wide.
74 minNeal skies an effort from 25 yards as DC start to run out of ideas. Houston keep giving the ball away on the break, but time is certainly on their side.
77 minChance for Houston! Garcia ghosts into the box again but this time can only head Sarkodie's cross straight at Hamid.
77 minBruin, who has not played well, comes off for Cam Weaver.
78 minChance for Houston! Fantastic save Hamid! Kandji strikes hard from inside the box but Hamid gets a solid arm on it to deflect clear.
80 minDavis gets a sight on his left foot, but it's blocked for a corner. Houston are closing this out here.
81 minThe 2006 and 2007 winners, and finalists last year, have been thoroughly professional tonight from front to back.
81 minWeaver tries to lob Hamid, who had kicked poorly, from 50 yards, but it sails over.