First-half goals by record signing Mesut Ozil and in-form Frenchman Olivier Giroud, his sixth this season gave the Gunners their tenth successive win.
Arsenal hold a three-point lead over both Napoli and last season’s beaten finalists Borussia Dortmund, who beat Marseille 3-0. Arsenal and Dortmund play in the upcoming double header in what promises to be two great games.
Arsenal’s London rivals Chelsea got their Champions League campaign back on track with a 4-0 rout of Romanian side Steaua Bucharest.
With Andre Schurrle and Juan Mata in scintillating form, Chelsea got two goals from Ramires and one from Frank Lampard in the 4-0 win.
Chelsea next face two games in succession against Schalke, who will go into the first match top of the group thanks to impressive young German international Julian Draxler’s second-half goal that saw off Basel 1-0 in Switzerland.
Elsewhere, Barcelona took control of their group with a tough 1-0 win over 10-man Celtic at Parkhead, Barça have a two-point lead over AC Milan, who face them next in a double header, after the Italian side salvaged a 1-1 draw against Ajax in Amsterdam with a Mario Balotelli penalty four minutes into stoppage time.
Barça’s Spanish rivals Atletico Madrid displayed the grittiness that their coach Diego Simeone displayed during his playing career to come back and beat Porto 2-1 away and top their group on six points, leaving them unbeaten on the field of play this season.
Porto’s prolific Colombia marksman Jackson Martinez gave Porto a first-half lead but Atletico fought back to win with second-half goals by Uruguayan international Diego Godin and Turkish international Arda Turan.