The third games of the second round at FIBA Americas 2011 on Wednesday gave the tournament the rest of its semifinalists after host Argentina had advanced earlier. Defending champion Brazil made a major move by knocking off previously undefeated Argentina 73-71 in a thriller. The victory let Brazil tie Argentina in the group standings at 5-1, a record they share with Puerto Rico, too. Marcelinho Huertas of FC Barcelona Regal played 39 minutes and led Brazil to victory with 17 points, 3 rebounds, 2 assists and a steal. Brazil did it with defense, holding Argentina under 20 points in each of the first three quarters while taking a 53-47 lead into the last one. Despite 13 points and 5 assists from Pablo Prigioni of Caja Laboral, Argentina could not make up all the difference before the buzzer. Puerto Rico made advancing look easy by cruising past Dominican Republic 62-79 as Alexander Galindo scored 16 points and Jose Barea 14. Despite the loss, Dominican Republic has a 4-2 record and will be the fourth semifinalist. Venezuela dealt with winless Panama just as easily, rolling to a 110-74 victory as Greivis Vasquez had 24 points, 8 assists. Venezuela improved to 2-4, as did Canada, a 70-68 winner over Uruguay. Jermaine Anderson of KK Buducnost contributed 8 points to Canada's victory, while Esteban Batista of Anadolu Efes had 8 rebounds for Uruguay. The semifinalists, whose matchups must be decided by the last group games on Thursday, will play Saturday for a place in the 2012 London Olympics. The losers of the semis and the winner of a fifth-place game will reach next summer's 2012 FIBA World Olympic Qualifying Tournament, from which three of 12 teams will advance to London.