Just before the hour mark, Porro was preparing to take a throw-in close to the Arsenal technical area. Arteta, animated as ever, appeared to take issue with the location of the throw and signalled to the officials, urging them to intervene as Porro had advanced significantly beyond where the ball had gone out.
The Spaniard, clearly annoyed by Arteta’s protests, responded aggressively. In a moment of frustration, Porro shoved the Arsenal boss in an effort to clear space and continue play. Arteta seemed ready to retaliate, stepping toward the defender, but before things could escalate further, the fourth official rushed in to diffuse the situation and separate the two.