It was a comprehensive win in the end and one that encapsulated what Arsenal can do under Unai Emery. "Everyone knows Theo Walcott needs a lot of chances to find the back of the net and it's a question of whether he suits the style at Everton, which he and his team-mates are still adapting to under Marco Silva. But also we have three goalkeepers and Petr Cech is in good form", he added.
However, Arsenal's patience was rewarded after half an hour, with Henrikh Mkhitaryan stealing possession deep in his own half and picking out Iwobi on the counter, who was able to cross for Aubameyang to tap in on his European debut for the club.
"It's really frustrating and I'll tell you why", said Silva, Everton's manager.
"I think my performances in training are good".
"It's clear where Kenny is in that moment and it's clear on the second touch [by Ramsey] where the player who finishes is as well".
Emery has certainly been true his words in that respect. Since his Premier League debut on February 3, only Liverpool's Mohamed Salah (16) has scored more goals than Aubameyang's 12.
Only once has he retained the same eleven - for the recent trips to Cardiff and Newcastle - when he surprised many by playing strikers Pierre-Emerik Aubameyang and Alexandre Lacazette together.
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The Gunners secured the three points against an Everton side who have invested heavily in their playing squad over the past few seasons.
The Gunners host Everton on Sunday at the Emirates, looking for a fourth consecutive win, but they did manage a 4-2 win over FC Vorskla on Thursday night in their opening European tie of the new season.
With five minutes remaining of the first half Rob Holding replaced Sokratis in defence as the former Borussia Dortmund centre-half limped off after injuring his leg in a challenge which was precipitated by sloppy play from fellow defensive colleague Shkodran Mustafi.
The Emirates chief declared: "It is 38 matches for the Premier League season".
"But we spoke at half-time about how to stop them and we had better positions when Everton attacked. But I am confident in my team".
He is unlikely to change it now, with fixtures against Watford, Fulham, Leicester and Crystal Palace up next in the league, but will want to get it right by the following match, the visit of Liverpool on 3 November. "The victory was very important". To play to win it is the best and correct way.
The Gunners have failed to qualify for Europe's top club competition in the previous two seasons, finishing a distant sixth in the Premier League in Arsene Wenger's final year in charge.