Milan's recent slump in form continued on Saturday night as Gennaro Gattuso's side were surprisingly beaten by Serie A strugglers Benevento.
The away team remain bottom of Italy's top flight despite the win, but Pietro Iemmello's confident finish and the defence's solid performance will give manager Roberto De Zerbi belief that his side can return to Serie A soon after their inevitable relegation.
Milan had an early penalty appeal waved away as Patrick Cutrone went to ground before Fabio Borini's low cross eluded Andre Silva following Christian Puggioni's save.
Ricardo Rodriguez had an embarrassing moment early on when his back pass almost ended up in his own net, but Gianluigi Donnarumma scrambled back to clear the ball off the line.