In the club's opening league match of the 2016–17 season against Torino, on 21 August, Donnarumma saved the first penalty of his professional career; he stopped Andrea Belotti's shot in injury time, which enabled Milan to seal a 3–2 victory at home. He kept his first clean sheet of the season in the 1–0 victory against Sampdoria on 16 September. On 23 December, Donnarumma helped lead Milan to victory in the Supercoppa Italiana, saving Paulo Dybala's penalty in a 4–3 shoot-out win following a 1–1 draw after extra time. On 15 June 2017, it was initially announced that Donnarumma would not be renewing his contract with Milan, however on 11 July, after much speculation, he renewed with Milan until 2021. Under the terms of a new contract, negotiated by agent Mino Raiola on behalf of the player, Donnarumma's annual salary rose to €6 million; the deal also included a verbal agreement to sign his older brother, Antonio, as a backup goalkeeper with an annual salary of €1 million.