The manager reflected on the Gunners' stunning Europa League elimination at the hands of Olympiacos on Thursday
Arsenal head coach Mikel Arteta acknowledged it will be "very hard" for the Gunners to secure Champions League qualification via the Premier League after crashing out of the Europa League.
Pierre-Emerick Aubameyang's stunning late miss in the final seconds saw Arsenal eliminated by Greek visitors Olympiacos, who sensationally prevailed 2-2 on away goals following Thursday's 2-1 extra-time victory.
Arsenal won the last-32 first-leg 1-0 but extra time was needed after Pape Abou Cisse's restored parity for Olympiacos across two legs at the Emirates Stadium.