16 July 2011
Colombia – Peru
Referee: Francisco Chacon (MEX, photo)
Assistant Referee 1: Leonel Leal (CRC)
Assistant Referee 2: Francisco Mondria (CHI)
Fourth Official: Walter Quesada (CRC)
Uruguay – Argentina
Referee: Carlos Amarilla (PAR)
Assistant Referee 1: Nicolas Yegros (PAR)
Assistant Referee 2: Luis Sanchez (VEN)
Fourth Official: Juan Soto (VEN)
17 July 2011
Brazil – Paraguay
Referee: Sergio Pezzotta (ARG)
Assistant Referee 1: Ricardo Casas (ARG)
Assistant Referee 2: Efrain Castro (BOL)
Fourth Official: Raul Orosco (BOL)
Chile – Venezuela
Referee: Carlos Vera (ECU)
Assistant Referee 1: Luis Alvarado (ECU)
Assistant Referee 2: Luis Abdie (PER)
Fourth Official: Victor Rivera (PER)