Lukaku started from the bench ahead of the weekend 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.