Paris St Germain, who are seeking their first Champions League title, will take on Barcelona
Atletico looked dead and buried when Dimarco pushed home Inter's opener.
"A magic night. We expected a really tough opponent. It's very difficult to generate momentum and that's credit to (Porto)," Arteta told reporters.
The Spanish champions won 3-1 at the Olympic Stadium to seal a 4-2 aggregate win against last year's Serie A winners, returning to the last eight for the first time since 2020.
The teams were locked at 1-1 on aggregate after an absorbing second leg at the Emirates but Raya saved twice in the shootout to break the hearts of the two-time champions.
The 16-year-old winger could prove crucial in the Champions League last 16 second-leg clash with Napoli on Tuesday at the club's temporary Olympic Stadium home.
The Spanish Football Federation (RFEF) suspended the 20-year-old for showing contempt towards referee Jesus Gil Manzano after receiving a red card in Real's 2-2 league draw with Valencia on Saturday.
The English champions have not lost a Champions League game at the Etihad since 2018 and became the first side in the competition's history to score three or more goals in nine consecutive home games.
Manuel Akanji and Julian Alvarez struck early at the Etihad Stadium to put the tie beyond reach. Mohamed Elyounoussi pulled a goal back for the Danes before Erling Haaland scored in first-half stoppage time.
Bayern Munich striker Harry Kane hopes Tuesday's 3-0 win over Lazio, which secured progress to the Champions League last eight, will be a "turning point" in the club's season.
Kylian Mbappe insisted he had "no problem" with Paris Saint-Germain coach Luis Enrique after scoring a brace in his side's win over Real Sociedad in the last 16 of the Champions League on Tuesday.
Kylian Mbappe lethally fired Paris Saint-Germain into the Champions League quarter-finals with a brace in a 2-1 win at Real Sociedad on Tuesday, his team cruising through 4-1 on aggregate.
FC Copenhagen manager Jacob Neestrup says his underdogs will need a "miracle" to knock out Champions League holders Manchester City in Wednesday's last 16 second leg.
In February, Bayern announced Tuchel would leave the club at the end of the season, less than a year after replacing the sacked Julian Nagelsmann.
PSG have suffered numerous humiliating defeats at this stage of the Champions League in recent years but they are ideally placed to advance to the quarter-finals this time after winning 2-0 at home to the Basque side in last month's first leg.
Xavi is optimistic of Barcelona reaching the quarterfinals of the Champions League despite watching his dominant team held 1-1 at Napoli on Wednesday.
Nigeria forward Osimhen rolled home the leveller with 15 minutes left of the first leg of their Champions League last 16 tie at the Stadio Diego Armando Maradona, in his first match since returning from the Africa Cup of Nations.
Appearing in a first knockout match in Europe's premier club competition for seven years, Arsenal struggled to break down an organised Porto defence before Galeno's stroke of brilliance in the 94th minute.
Struggling Napoli sacked Walter Mazzarri and brought in Slovakia coach Francesco Calzona on Monday, 48 hours before they host Barcelona.