Heading into the second leg with a 1-0 deficit to make up from the opening encounter, Arsenal levelled the tie on aggregate through Leandro Trossard's fine first-half finish but could not find a way through a resolute Porto defence for a second time.
Following 120 minutes of nerve-wracking action, goalkeeper David Raya wrote his hero story with two saves from the penalty spot, as Arsenal progressed to the quarter-finals with a 4-2 shootout success after a 1-1 aggregate draw.
After the action had concluded, Arteta went to shake hands with Conceicao on the Emirates pitch, but his opposite number rebuffed the gesture and instead made a comment into the Spaniard's ear before the pair went their separate ways.
Conceicao then accused the Arsenal boss of insulting his family during his post-game press conference, telling reporters: «The result was unjust. Our team deserved to go through.
»During the game and towards the bench he, in Spanish, I don't know if this is to do with Spanish managers, he insulted my family. And then at the end, I said attention, who he insults is not between us, he should focus on training his team because they have a lot of individual qualities to do that."
Conceicao had previously blasted Manchester City boss Pep Guardiola for an «extremely unpleasant» attitude during their clash in the 2020-21 group stage, before also going on to claim that then-Chelsea head coach Thomas Tuchel had insulted him after their quarter-final encounter that same year.
However, when asked by the media to lift the lid on his post-match
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