The emphatic victory means Arsenal has won all three of its opening Champions League fixtures without conceding a single goal.<\/p>\r\n\r\n
Both sides struck the woodwork before Gabriel headed in Declan Rice's free-kick to give the hosts the advantage shortly before the hour.<\/p>\r\n\r\n
Three further goals followed in the next 13 minutes, as Gabriel Martinelli curled into the corner before Viktor Gy\u00f6keres' double added extra gloss to the scoreline.<\/p>\r\n\r\n
The Gunners began brightly, with Eberechi Eze striking the crossbar via a deflection early on, while Atletico's Julian Alvarez almost punished goalkeeper David Raya, who was caught off his line by a long-range effort.<\/p>\r\n\r\n
The first half remained tight and tactical, with few clear chances for either side. That continued after the break until center-back Gabriel Magalhaes broke the deadlock in the 57th minute, heading in Declan Rice's pinpoint free-kick.<\/p>\r\n\r\n
That goal unleashed Arsenal's attacking fury. Myles Lewis-Skelly's driving run set up Gabriel Martinelli to curl home a superb second, before striker Viktor Gyokeres bundled in his first Arsenal goal in eight matches to make it 3-0.<\/p>\r\n\r\n
Just three minutes later, the Swedish forward struck again, this time turning in Gabriel's knockdown from a dangerous corner to complete a stunning burst of four goals in just 14 minutes.<\/p>\r\n\r\n
Earlier, Fermin Lopez hit a hat-trick as Barcelona beat Olympiacos, earning an emphatic 6-1 first home win.<\/p>\r\n\r\n
Just three minutes later, the Swedish forward struck again, this time turning in Gabriel's knockdown from a dangerous corner to complete a stunning burst of four goals in just 14 minutes.<\/p>\r\n\r\n
Lamine Yamal's spot kick proved the first of four goals in 12 minutes for rampant Bar\u00e7a, Ferm\u00edn L\u00f3pez completing his treble in between two Marcus Rashford strikes as the five-time champions reached six points.<\/p>\r\n\r\n