Andre Silva scored his first Serie A goal in the final seconds of the game as AC Milan earned a dramatic last-gasp 1-0 win at Genoa.
The Portugal striker arrived at San Siro from Porto among much fanfare in the close-season, but he had failed to score in 16 previous top-flight matches for the Rossoneri in a difficult domestic campaign.
However, Silva was the hero for Gennaro Gattuso's men at the Luigi Ferraris when he leapt to head in Suso's 94th-minute cross and settle what had been an attritional contest.
Genoa will feel aggrieved not to have secured a share of the spoils having defended resolutely for most of the game, and had Luca Rigoni not been denied by a tight VAR call or Ervin Zukanovic not spectacularly fluffed his lines with a close-range header in the second half the hosts might have won ot.
For Milan, the late drama marks a spirited response to the 2-0 Europa League defeat to Arsenal – their first loss in any competition since December – and they will now look ahead to Thursday's rescue mission in the second leg.
A three-point return also sees Gattuso's men close to within six points of the Champions League qualification places.