In May 2019, Guerrero was included in Ricardo Gareca's final 23-man squad for the 2019 Copa América in Brazil. He scored the opening goal in Peru's second group game of the tournament on 18 June – a 3–1 victory over Bolivia. In the semi-finals against defending champions Chile on 3 July, Guerrero scored the final goal of a 3–0 win, which saw Peru advance to the final of the tournament for the first time since 1975.