Mikel Arteta was unimpressed with Arsenal against Olympiacos as Bernd Leno warned any repeat would see the team end the season empty-handed.
Youssef El-Arabi scored yet again against Arsenal, but his strike was not enough to inspire a comeback for Olympiacos at Emirates Stadium.
Real Madrid loanee Martin Odegaard has had a positive impact at Arsenal and Mikel Arteta thinks he can be a bigger goal threat.
Arsenal were in dominant form on Thursday, though a typical defensive lapse could have proved costly if not for a pair of late goals.
Another defensive mistake from Arsenal looked set to prove costly, but unlikely heroes Gabriel and Mohamed Elneny gave the Gunners the edge.
Pierre-Emerick Aubameyang has found some form for Arsenal, but manager Mikel Arteta still sees room for improvement.
Martin Odegaard is yet to make an impact in terms of goals or assists, but Mikel Arteta is delighted with his Arsenal start.
Having felt compelled to apologise for his mistake against Burnley, Arsenal's Granit Xhaka has received some timely praise.
Olympiacos knocked Arsenal out of last season's Europa League and Mikel Arteta is expecting a difficult rematch.
Real Madrid have a tough test against Borussia Monchengladbach between them and a place in the last 16 of the Champions League.