MIKEL ARTETA'S tactics were exposed by BT Sport during their Europa League clash with Dundalk. The TV cameras cut to the Gunners boss in the early stages of the Group B game at the Emirates. And eagle-eyed viewers noticed a tactics board open in the background - before producers then zoomed in on the open notes to make sure everyone saw. The plans appeared to show a line-up formation graphic with part of Arsenal's shape possibly featuring a back three. And just as the tactics board may have suggested, the Gunners lined up with Shkodran Mustafi, Granit Xhaka and Sead Kolasinac as the three central defenders for the European tie against the Irish minnows. ARSENAL NEWS LIVE: Click here for the latest Gunners news But it appeared Dundalk were wise to their Premier League opponents' tactical flip as they surprisingly frustrated Arsenal for most of the first half - until the floodgates opened just before the break. Plenty of fans on social media at home were baffled by the Spaniard's … [Read more...] about Arsenal boss Mikel Arteta’s tactics revealed as BT Sport zoom in on board in Dundalk clash