The English transfer window shuts at 17.00 UK time Thursday so after that point Arsenal will not be able to buy new players but players can still be sold.
Let’s have a look at the major leagues in Europe and what dates they officially close…..
France: September 2nd 2019
Germany: September 2nd 2019
Italy: August 23rd 2019
Spain: September 2nd 2019
So, that means that if Real Madrid, Barcelona, Bayern Munich, Juventus, PSG decide they want to buy an Alexandre Lacazette or Pierre-Emerick Aubameyang they can do and Arsenal will not be allowed to source a replacement.
That is one side of the coin but there is another.
It means that over the next four days Arsenal does not need to sell, as an example, Laurent Koscielny can still join Bordeaux or Rennes right up until September 2nd.
There is without a doubt a few players that Arsenal really does need to find buyers for, Shkodran Mustafi, Henrikh Mkhitaryan, Mohamed Elneny and even Mesut Ozil to name just a few.
Unai Emery will be in a better position once competitive games get underway and that will determine, to some extent, who he can offload without it affecting the squad.
There will be four Premier League games prior to September 2nd and so there is no real desperation to start selling. Imagine if there was a couple of injuries in a key area, say midfield, then Emery would probably not weaken that part of the team even if the players he has left available are not his first choice.
So, in conclusion, the next four days really are all about who Arsenal sign and not who they will be selling.