Whilst that transfer is all signed, sealed and delivered, with just medicals and work permits to sort out, the Gunners are still chasing their move for Borussia Dortmund striker Pierre-Emerick Aubameyang.
The Gabon global forward has been strongly linked with the Gunners and Wenger says that talks are underway.
But Arsenal could come out of the January transfer window stronger than before - despite losing arguably their best player.
Arsenal seem to be ramping up their efforts to sign Borussia Dortmund's Pierre-Emerick Aubameyang after the Alexis Sánchez-Henrikh Mkhitaryan swap with Manchester United.
IMF Raises Global Growth Forecasts
The stronger outlook was attributed to the stronger momentum in domestic demand and higher external demand. The Chinese economy, the world's second-biggest, is believed to have grown 6.8 percent in 2017.
According to recent reports, Arsenal's new head of recruitment Sven Mislintant is now in Germany discussing the details of the deal with Dortmund.
"Sanchez has gone, so Arsenal have to replace him and with Aubameyang's pace and power..."
Dortmund coach Peter Stoeger on Thursday indicated the 28-year-old would be in the squad but the forward was surprisingly left out with club officials saying he was not focussed enough.
These are the kind of things that, at the moment, are one of the possible movements.
According to Sky Sports, Wenger had this to say when he was asked if he was confident of completing the deal: "Confident or not confident, I don't know".
On the Armenian worldwide arrival at Arsenal on Monday, Wenger told reporters, "We're replacing a very good player with a very good player, a world-class player with a world-class player".