The summer signing from Dijon came in as Arteta changed the entire starting XI from Sunday's defeat to Leicester.
Sead Kolasinac was deployed at centre-back alongside Shkodran Mustafi while Granit Xhaka captained the side and with Eddie Nketiah named in attack, the likes of Pierre-Emerick Aubameyang, Willian and Alexandre Lacazette were all among the substitutes - as was highly-rated young forward Forlarin Balogun.
Arsenal XI: Runarsson, Cedric, Mustafi, Kolasinac, Maitland-Niles, Willock, Elneny, Xhaka, Nelson, Nketiah, Pepe
Subs: Leno, Bellerin, Tierney, Gabriel, Saka, Ceballos, Lacazette, Willian, Aubameyang, Thomas, Hein, Balogun
Dundalk XI: Rogers, Gartland, Boyle, Daniel Cleary, Mountney, Murray, Shields, McEleney, Dummigan, Hoban, Duffy
Subs: Corcoran, Gannon, Hoare, Flores, Sloggett, Leahy, Oduwa, McCarey, Colovic, Kelly, McMillan
Referee: Filip Glova
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