Elías Pereyra  Elías Juan Pereyra (born 15 February 1999) is an Argentine professional footballer who plays as a left back for Portuguese club Benfica on loan from San Lorenzo. Pereyra's career got underway with San Lorenzo, signing in 2007. Claudio Biaggio was the manager who gave him his debut, selecting to start and finish a 2–2 draw with Lanús on 19 August 2018. His next appearance arrived days later in the Copa Sudamericana versus Nacional. Pereyra has previously been selected by the Argentina U20s, including to train with the senior squad in March 2018 and at the 2018 FIFA World Cup months later. In December, Pereyra was picked for the 2019 South American U-20 Championship. Pereyra was diagnosed with leukemia at the age of 13. After ten months of chemotherapy at Hospital Garrahan, Pereyra was cleared of the disease.