The goalkeeper left Milan as a free agent over the summer after refusing to sign a new contract and joined Paris Saint-Germain.
This was his first return to San Siro since that exit and, as expected, a group of Milan supporters jeered every time he touched the ball.
Even the Spain players realised that the situation was toxic at the Stadio Giuseppe Meazza, as Sergio Busquets walked over to Donnarumma ahead of the corner and gave him a reassuring pat on the shoulder.
It is not the first time that Milan supporters have used international duty to insult Donnarumma over a contract dispute, as they famously jeered him and waved cash in front of the goalkeeper during the European Under-21 Championship.
🚨 GOAL 🚨
🗣 “You have to say the writing was on the wall”
— Sky Sports Football (@SkyFootball) October 6, 2021