In a duel that had decisive action by the video referee for the result, Grêmio beat Caxias 2-1 on Sunday night, at the Centenary, in the first game of the Gauchão semifinal. Diego Souza was the highlight of the match by scoring both tricolor goals. Marlon did for Grená. The expulsion of a member of the Grená technical commission in the first half removed coach Rafael Lacerda from the rest of the match, according to the competition rules.