Gremio v River Plate - Copa CONMEBOL Libertadores 2018

PORTO ALEGRE, BRAZIL - OCTOBER 30: Referee Andres Cunha shows the yellow card to Matheus Bressan of Gremio after checking the Video Referee Assistant (VAR) during the match against Gremio as part of Copa Conmebol Libertadores 2018 at Arena do Gremio on October 30, 2018, in Porto Alegre, Brazil. (Photo by Lucas Uebel/Getty Images)