It's at The Emirates where the 27-year-old produces his very best as 11 of his 15 goals have been scored on home soil, while he has notched four in his last three starts at home.
"Little by little, we are conceding a few chances to the opposition, the same like in Newcastle".
The visitors bagged a consolation goal two minutes later as Lichtsteiner went from hero to zero after giving the ball away on the edge of the box, allowing Volodymyr Chesnakov to pounce and fire past Leno.
"Each minute he's playing he's doing very well", Emery said.
Danny Welbeck doubled Arsenal's advantage immediately after half-time before Aubameyang put the game to bed ten minutes later with his second goal of the evening. Our challenge is to be competitive in 90 minutes over each match'. We are giving chances to many players to find the pieces and for the confidence.
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Lucas Torreira, on his first start for the club, almost added a second before the break, but his free kick went just wide of Bohdan Shust's goal.
"You have to say he's played with a lot of heart, a lot of spirit for a youngster, there's ingredients in his game that might have been missing from the team". It can't be a coincidence that we were cruising at 3-0 when he left the field last night before conceding two late goals to see the match end 4-2.
"I think we played well in the first half and at the beginning of the second as well and we scored four goals", he told reporters, with Everton up next in the English top flight on Sunday.
In his post-match press conference, Emery said his side need to improve.
Aubameyang enjoyed a restorative showing after only finding the net once during the first five Premier League games of the season, but the former Borussia Dortmund star was frustrated by his team-mates' late lapses.