Nottingham Forest must now prepare for an exciting fourth round tie at home to Midlands rivals Leicester City in February.
Arsenal, meanwhile, will turn their attention briefly back towards their EFL Cup semi-final against Liverpool, with that competition now representing their best chance of collecting silverware this campaign.
Arteta was coy when pressed on whether their poor performance against Forest was a sign that they need fresh investment this month.
The Gunners have been heavily linked with strikers such as Dusan Vlahovic, although their list of arrivals remains empty thus far.
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