David Raya proved the hero as Arsenal survived a penalty shootout to scrape past Porto and reach the quarter-finals of the Champions League for the first time in 14 years after a tense last-16 duel had ended 1-1 on aggregate on Tuesday.
Porto, who won the opening leg 1-0, proved stubborn opposition for the Premier League leaders and Arsenal fans must have feared another night of European heartache.
But Martin Odegaard, Kai Havertz, Bukayo Saka and Declan Rice all tucked away their spot kicks with clinical precision and Arsenal keeper Raya made two saves.