He said: 'Our defensive numbers aren't good enough.
"With the number of points and improvement we have in relation to last season, in normal conditions the distance would be a distance that leaves the fight open".
"We are an offensive team and I hope they can re-create that flawless understanding they had at Dortmund".
It was a decision, Wenger admitted, that owed more to the club's admiration for the player and they will be well aware that it could come back to haunt them.
'It is a lack of focus in vital moments. You see we went up against Bournemouth, Watford and most recently Swansea and yet we lost all 3 games.
"It is always hard to find the balance when you have so much of the ball".
Minivan rams into crowd in Shanghai
They say he has been arrested on suspicion of risky driving and illegal transport of unsafe substances. Police said the driver of the minivan is suspected in illegal transportation of flammable materials.
Theo Walcott returns to the Emirates for the first time on Saturday afternoon, as new club Everton attempt to end their very bad record against the Gunners. The 28-year-old England worldwide has made a good start at his new club, contributing an assist in Everton's 1-1draw against West Bromwich Albion before scoring twice in a 2-1 victory over Leicester City on Wednesday.
Danny Welbeck has not returned to full fitness just yet and will miss out completely on Saturday, whereas Jack Wilshere and Aubameyang face late fitness tests having both reported sick. Arsene Wenger now has the enviable job of fitting all his new attacking talent into his starting team.
Henrikh Mkhitaryan also arrived as part of the move that took Sanchez to Manchester United and the hope is that he will rediscover stronger form in London; the talent within the player is certainly there. Will I do it?
But he has pledged his allegiance to the Gunners and, while I don't understand it at all, fair play to him.
It's also a contract that makes him the highest paid player in Gunners history.