Simone Inzaghi saluted Inter Milan's unity after the Nerazzurri kept Porto at bay to secure their place in the Champions League quarter-finals.
Inter are through to the last eight of Europe's premier club competition for the first time in 12 years, after a goalless draw at Estadio do Dragao sealed a 1-0 aggregate victory over Sergio Conceicao's side.
UEFA has opened an investigation after Inter Milan supporters were denied entry to Tuesday's Champions League tie with Porto despite having tickets for the match.
Footage emerged on social media ahead of the last-16 second leg showing hundreds of fans queueing to get into Estadio do Dragao as the game kicked off.
Tuesday will bring two finely poised contests in the Champions League last 16 as the second legs continue.
A late goal from Romelu Lukaku gave Inter a narrow 1-0 advantage against Porto at San Siro heading into the return fixture in Portugal.
Simone Inzaghi warned Inter Milan must show more "conviction and malice" after they slumped to a 2-1 Serie A defeat at relegation-threatened Spezia on Friday.
Bartlomiej Dragowski saved an early Lautaro Martinez penalty to set the tone for a miserable night for Nerazzurri, who failed to reduce runaway leaders Napoli's 15-point lead.
Simone Inzaghi challenged Inter Milan to "continue at this pace" after returning to winning ways in Serie A with a comfortable victory over Lecce on Sunday.
Henrikh Mkhitaryan and Lautaro Martinez were on target as Inter responded to a 1-0 defeat against Bologna with a much-improved showing in a 2-0 triumph over Lecce at San Siro.
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