Milan ultras were insulting Gianluigi Donnarumma for an hour before kick-off ahead of the PSG match, giving a hint of what will await him at San Siro.
It kicks off at the Parc des Princes at 20.00 UK time (19.00 GMT).
This is the first time Donnarumma has faced his former club since leaving as a free agent and somewhat inevitably he was given a harsh greeting by the 2,000 fans who are in the stadium this evening.
With an hour to go before kick-off, the ultras were already hurling insulting chants towards the goalkeeper.
It is no surprise, as they also clubbed together to jeer Donnarumma when he played at San Siro for Italy in the EURO 2024 qualifier against Ukraine last month.
The reception he will receive when he plays at San Siro for PSG is going to be deafening.