In October 2019, Vialli was appointed as new delegation chief of the Italy national football team under head coach and personal friend Roberto Mancini (a former teammate and striking partner of his at Sampdoria), a position unfilled since Luigi Riva's retirement in 2013. On 11 July 2021, Italy won the UEFA Euro 2020 after a 3–2 victory on penalty shoot-out after a 1–1 draw on extra-time against England in the final.