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.
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.
The record 14-time champions were far below their best but did just enough over the two legs of the last-16 clash to edge out their Bundesliga opponents.