Petti was a member of the Argentina Under-20 side which competed in the 2013 and 2014 IRB Junior World Championships, he also represented the Argentina Jaguars side in 2013 and 2014 and played for the Pampas XV during their 2014 tour of Oceania.[2]
He made his senior debut for Los Pumas on 14 November 2014 in a 20-18 victory over Italy in Genoa.[5]