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That's the final whistle. Canada crashes out and the United States advances to the CONCACAF Championship semifinal and qualifies for the U-20 World Cup.
RED CARD. Substitute James took offense to a late Joya tackle, and headbutted the American midfielder. Canada will finish with 10 men.
CROSSBAR. Joya played in Dillon Serna along the left and the Rapids rookie cracked his shot off the bar. Crepeau then saved the rebound from Mario Rodriguez.
Another would have been harsh. Garcia fizzled into the box and a lucky bounce gave him the chance to shoot. Crepeau pushed it away.
It looked like Mario Rodriguez kicked out after being taken down, but he didn't connect and the referee let play continue.
Now Jose Villarreal makes way, with Colorado's Dillon Serna coming in.
Luis Gil makes way for Daniel Garcia. Gil will join up with Real Salt Lake tomorrow. It'll be interesting how Tab Ramos tries to replace him.
Looks like we have a bit of a shoving match. The U.S. players aren't happy about Stanese shoving Villarreal harshly and then kept the American attacker pinned to the ground temporarily.
Canada keeps pressing. A long cross from the flank was headed back into danger by Stanese. Clarke looked like he might have earned a penalty, but Stanese was offside.
Well that makes things interesting. Piette, wearing the captain's armband, scores for Canada. A corner wasn't cleared well enough, and Piette, from the top of the box, drilled it back in on goal.
Programming note: both Luis Gil and Jose Villarreal will leave the team tomorrow to join their MLS sides ahead of the season opener on Saturday. That will hinder the USA in the semis, but qualification will have been wrapped up (baring an incredible comeback here).
Aleman with some quick footwork to draw Villarreal into a yellow-card foul. He's been a bright spot with his quick touches since coming in at half.
Villarreal played Joya down the right. Joya immediately pulled it back to Villarreal, who took one touch to shake his marker and then another to bury his shot, and, likely, the game.
GOAL. This one is all but over with Villarreal's second goal.
Penalty appeal turned down. Aleman created a great chance with the outside of his boot, and Piette went down under pressure. The referee waved play on.
Canada has come out more riled up in the second half. Both wide players are pushing up closer to Clarke to give the shape a 4-3-3 look. However, there isn't much rhythm to the attack -- in either direction.
Aleman replaces Riggi, by the way. A slight offensive reshuffle, but not a major tactical realignment.
We're back for the second half. Aleman is in as a sub for Canada. The Canucks need at least two goals to have any chance of advancing here.
That's halftime. The United Sates leads 3-1 over Canada.
OH MY. From a goal down, the U.S. has roared back to lead 3-1 at halftime. Cuevas did well to earn a corner. After Crepeau punched the set piece away, Will Trapp blasted the ball back on goal. It looked to take a deflection on its way in.
Dollery is having a rough night. Both goals came from space in behind him. We'll see if Canada decides to make a change at the half -- having already been forced into one through injury -- now chasing the game.
Rodriguez, who has run down plenty of blind alleys, finally connects with his final ball. After running in from the left, he slides the ball through the entire Canada defensive block and Villarreal finishes.
BOOM. There's the go-ahead goal. The United States scores five minutes before the half to take the lead.
Reminder: somebody has to win today. If scores are level at full time, we'll have extra time and then penalties.
Since the goal, the U.S. has really applied the pressure. Joya won a free kick from about 30 yards out, which was floated delicately into the box. O'Neill came within a few inches of meeting it with his head.
Poor Henry. He's hiding his face behind a training jersey, clearly distraught to have to come off.
Canada captain Henry looks to have some sort of problem. Injury is forcing him off. James will replace him.
Cuevas again proves integral. His run to the byline beats Dollery, and he pulled the ball back to Gil. The RSL midfielder's delicate first touch took him around the defender and set up and open shot.
EQUALIZER. That didn't take long. Luis Gil hits back for the Americans.
Canada immediately into the attack again. Riggi floated a cross into the mixer and Clarke rose highest to meet it. His header sailed over.
GOAL. Canada takes the lead against the United States. Carreiro picked up the ball way out and no one bothered to close him down. His bouncing long-range shot beat Cropper to open the scoring.
Villarreal went down under a challenge and had to leave the field. He's back now, moving a bit gingerly.
After a rasping ball found Frisk, he cut inside his marker and uncorked a stern shot on target, which Cropper had to punch away.
The U.S. has held the better of possession and probably had the more chances, but Canada looks composed and secure a quarter hour into the match.
Canada earned a free kick straight down the middle about 30 yards out. Fisk kept his shot down, but it didn't have the power to beat Cropper.
Villarreal had a good look there. He cut in from the left and cracked a shot on fram, which Crespeau parried. Pulling the ball back for Rodriguez, open in the box, might have been the better option.
Clarke again involved, firing off Canada's first shit. It was from a narrow angle and went harmlessly wide.
A probing ball found the U.S. central defenders too far apart, and Clarke nipped in between them. Stanko moved over in time to snuff out the attack.
Stanese brought down Villarreal just outside the box. Joya's deflected free kick went wide.
We have kickoff. This next match will determine the fates of these sides. USA is in blue and white, Canada in red.
This match is in Puebla, Mexico. My favorite part is the brass band that plays radio hits.
Just to clarify, though this is the U-20 CONCACAF Championship quarterfinal, the winner qualifies for the U-20 World Cup in Turkey later this year. Both teams came through a three-team group to make it this far.
Kickoff will be a few minutes after 6pm ET, live on Fox Soccer for those watching in the United States.
U.S. U20s (4-2-3-1): Cropper; Okwuonu, Stanko, O'Neill, Ocegueda; Joya, Trapp; Rodriguez, Gil, Cuevas; Villarreal
We've got some lineups. Canada U20s (4-1-4-1): Crépeau; Dollery, Henry (C), Stanese, Lapenna; Eustaquio; Piette, Riggi, Fisk, Carreiro; Clarke.
Hello there. This is Zac Lee Rigg, and I'll be yammering throughout this crucial match to see which side qualifies for the U20 World Cup.
Live Final scheduled Suspended Cancelled Postponed