31 October 2017 Lanus – River Plate Referee: Wilmar Roldan (COL, photo) Assistant Referee 1: Alexander Guzman (COL) Assistant Referee 2: Christian De la Cruz (COL) Fourth Official: Victor Carrillo (PER) VAR: Andres Cunha (URU) AVAR: Gery Vargas (BOL) VAR 2: Nicolas Taran (URU) Referee Assessor: Alicio Pena (BRA) Referees Committee: Jorge Larrionda (URU)
1 November 2017 Gremio – Barcelona Referee: Roberto Tobar (CHI) Assistant Referee 1: Carlos Astroza (CHI) Assistant Referee 2: Christian Schiemann (CHI) Fourth Official: Mario Diaz de Vivar (PAR) VAR: Julio Bascunan (CHI) AVAR: Jesus Valenzuela (VEN) VAR 2: Milciades Saldivar (PAR) Referee Assessor: Hector Baldassi (ARG) Referees Committee: Wilson Seneme (BRA)
31 October 2017