Substitute Romelu Lukaku rescued Inter with a 119th-minute winner to knock Fiorentina out of the Coppa Italia with a 2-1 win for the second season running.

Lukaku started from the bench ahead of Sunday's Derby d'Italia against Juventus but was called for in the second half after Christian Kouame had cancelled out Arturo Vidal's penalty opener.

There was no immediate impact as the Nerazzurri sought to get their season back on track, having taken just a point from their prior two Serie A matches.

Yet Lukaku made his mark deep into extra time at the Artemio Franchi, powering a header past Pietro Terracciano to book Inter's place in the quarter-finals.