Santiago RivasSantiago Agustín Rivas is an Argentine professional footballer who plays as a midfielder for Defensores Unidos.CareerRivas started his senior career with Primera B Metropolitana's Defensores Unidos. He was substituted on for his professional debut on 18 May 2019 versus Flandria after seventy-two minutes, though would depart the 3–1 loss four minutes later having received a red card; he had been substituted on in place of Fernando Magallán.