Luka Jovic made the difference for AC Milan one minute after coming on as an 80th-minute substitute with the winning strike in their 3-2 Serie A victory at Frosinone.
Olivier Giroud nodded in the opener which was cancelled out before the break by Matias Soule’s penalty, but Luca Mazzitelli fired the hosts in front after half-time.
The sides were back on level terms when Matteo Gabbia, assisted by Giroud, found the back of the net with a diving header before Serbia striker Jovic wrapped up the win.
There was a chance inside the first minute for Soule, who fired the ball over the crossbar, as the hosts piled on more pressure in the opening exchanges.
Yet it was the visitors who soon settled in and took the lead in the 17th minute, when Giroud connected with Rafael Leao’s pinpoint cross and cushioned the opener into the bottom right.
Milan goalkeeper Mike Maignan had only just made his first save, tipping Demba Seck’s effort over the crossbar, when Leao was punished for a handball at the right edge of his side’s 18-yard box.
Milan protested, but the penalty was ultimately upheld after a VAR check and Soule stepped up to the spot and fired past Maignan, who moved in the right direction but could not make the stop.