Inter Milan moved into the UEFA Champions League quarterfinals for the first
Inter were looking for a resounding response after a poor run of domestic performance and entered the Estadio do Dragao with a slender first-leg lead thanks to Romelu Lukaku's late winner.
Porto dominated the game but Inter goalkeeper Andre Onana kept the Portuguese side at bay.
The Nerazzurri survived a scare deep into stoppage time, as Denzel Dumfries made a desperate goal-line clearance while Onana fingertipped Mehdi Taremi's header onto the upright before Marko Grujic hit the post.
The home side were reduced to 10 men as winger Pepe received his second yellow card, and Porto failed to turn the game around.
Inter followed AC Milan to become the second Serie A side to reach the Champions League quarters, with Napoli expected to follow them as they host Eintracht Frankfurt on Wednesday with a 2-0 first-leg lead.
