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Argentina's Boca Juniors' Julio Cesar Caceres from Paraguay celebrates after scoring his team's second goal during a Copa Libertadores soccer game against Mexico's Atlas in Buenos Aires on May 14, 2008 - Photogallery
Argentina's Boca Juniors' Julio Cesar Caceres from Paraguay celebrates after scoring his team's second goal during a Copa Libertadores soccer game against Mexico's Atlas in Buenos Aires on May 14, 2008. (AP Photo/Eduardo Di Baia)
() Argentina's Boca Juniors' Julio Cesar Caceres from Paraguay celebrates after scoring his team's second goal during a Copa Libertadores soccer game against Mexico's Atlas in Buenos Aires on May 14, 2008. (AP Photo/Eduardo Di Baia)
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Mexico's Atlas' Omar Flores celebrates after scoring during a Copa Libertadores soccer game against Argentina's Boca Juniors in Buenos Aires on May 14, 2008 - Photogallery
Mexico's Atlas' Omar Flores celebrates after scoring during a Copa Libertadores soccer game against Argentina's Boca Juniors in Buenos Aires on May 14, 2008. (AP Photo/Eduardo Di Baia)
() Mexico's Atlas' Omar Flores celebrates after scoring during a Copa Libertadores soccer game against Argentina's Boca Juniors in Buenos Aires on May 14, 2008. (AP Photo/Eduardo Di Baia)
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Sao Paulo FC's Richarlyson fights for the ball with Fluminense's Thiago Neves during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008 - Photogallery
Sao Paulo FC's Richarlyson fights for the ball with Fluminense's Thiago Neves during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008. (AP Photo/Andre Penner)
() Sao Paulo FC's Richarlyson fights for the ball with Fluminense's Thiago Neves during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008. (AP Photo/Andre Penner)
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Sao Paulo FC's Carlos Alberto (L) fights for the ball with Fluminense's Roger during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008 - Photogallery
Sao Paulo FC's Carlos Alberto (L) fights for the ball with Fluminense's Roger during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008. (AP Photo/Andre Penner)
() Sao Paulo FC's Carlos Alberto (L) fights for the ball with Fluminense's Roger during a Copa Libertadores soccer game in Sao Paulo on May 14, 2008. (AP Photo/Andre Penner)
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Argentina's Estudiantes de La Plata's Marcos Angeleri battles for the ball with Ecuador's Liga Deportiva Universitaria's Claudio Bieler (L) from Argentina during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008 - Photogallery
Argentina's Estudiantes de La Plata's Marcos Angeleri battles for the ball with Ecuador's Liga Deportiva Universitaria's Claudio Bieler (L) from Argentina during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008. (AP Photo/Daniel Luna)
() Argentina's Estudiantes de La Plata's Marcos Angeleri battles for the ball with Ecuador's Liga Deportiva Universitaria's Claudio Bieler (L) from Argentina during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008. (AP Photo/Daniel Luna)
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Argentina's Estudiantes de La Plata's Juan Manuel Salgueiro (L) battles for the ball with Argentina's Ecuador's Liga Deportiva Universitaria's Diego Calderon during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008 - Photogallery
Argentina's Estudiantes de La Plata's Juan Manuel Salgueiro (L) battles for the ball with Argentina's Ecuador's Liga Deportiva Universitaria's Diego Calderon during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008. (AP Photo/Eduardo Di Baia)
() Argentina's Estudiantes de La Plata's Juan Manuel Salgueiro (L) battles for the ball with Argentina's Ecuador's Liga Deportiva Universitaria's Diego Calderon during a Copa Libertadores soccer game in La Plata, Argentina on Tuesday, May 6, 2008. (AP Photo/Eduardo Di Baia)
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Mexico's Atlas' Bruno Marioni, from Argentina, holding a shoe in his right hand, kisses his teammate Ulises Mendivil, as he celebrates after scoring during a Copa Libertadores game against Argentina's Lanus in Guadalajara, Mexico on Tuesday, May 6, 2008 - Photogallery
Mexico's Atlas' Bruno Marioni, from Argentina, holding a shoe in his right hand, kisses his teammate Ulises Mendivil, as he celebrates after scoring during a Copa Libertadores game against Argentina's Lanus in Guadalajara, Mexico on Tuesday, May 6, 2008. (AP Photo/Guillermo Arias)
() Mexico's Atlas' Bruno Marioni, from Argentina, holding a shoe in his right hand, kisses his teammate Ulises Mendivil, as he celebrates after scoring during a Copa Libertadores game against Argentina's Lanus in Guadalajara, Mexico on Tuesday, May 6, 2008. (AP Photo/Guillermo Arias)
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Argentina's River Plate's Sebastian Abreu celebrates after scoring during a Copa Libertadores soccer match on Thursday, April 17, 2008 - Photogallery
Argentina's River Plate's Sebastian Abreu celebrates after scoring during a Copa Libertadores soccer match on Thursday, April 17, 2008. (AP Photo/Natacha Pisarenko)
() Argentina's River Plate's Sebastian Abreu celebrates after scoring during a Copa Libertadores soccer match on Thursday, April 17, 2008. (AP Photo/Natacha Pisarenko)
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Salvador Cabanas (L) of Mexico's CF America fights for the ball with Marcos Gonzalez of Chile's Universidad Catolica during their Copa Libertadores soccer match in Santiago on Thursday, April 17, 2008 - Photogallery
Salvador Cabanas (L) of Mexico's CF America fights for the ball with Marcos Gonzalez of Chile's Universidad Catolica during their Copa Libertadores soccer match in Santiago on Thursday, April 17, 2008. (Reuters/Ivan Alvarado)
() Salvador Cabanas (L) of Mexico's CF America fights for the ball with Marcos Gonzalez of Chile's Universidad Catolica during their Copa Libertadores soccer match in Santiago on Thursday, April 17, 2008. (Reuters/Ivan Alvarado)
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Gustavo Cabral (L) of Argentina's River Plate jumps for a header with Roberto Ovelar of Peru's Universidad San Martin during their Copa Libertadores soccer match in Buenos Aires on April 17, 2008 - Photogallery
Gustavo Cabral (L) of Argentina's River Plate jumps for a header with Roberto Ovelar of Peru's Universidad San Martin during their Copa Libertadores soccer match in Buenos Aires on April 17, 2008. (Reuters/Marcos Brindicci)
() Gustavo Cabral (L) of Argentina's River Plate jumps for a header with Roberto Ovelar of Peru's Universidad San Martin during their Copa Libertadores soccer match in Buenos Aires on April 17, 2008. (Reuters/Marcos Brindicci)