Wenger was also uncertain whether his record signing Pierre-Emerick Aubameyang will feature against Everton in a four-man attack alongside Mesut Ozil, Alexandre Lacazette and Henrikh Mkhitaryan after revealing that the forward.
Manager Sam Allardyce may decide to rest Seamus Coleman after his first appearance in 319 days after a double leg fracture, while midfielder James McCarthy is in the early stages of rehabilitation from a similar injury. He started yesterday, but was still not completely well.
Arsene Wenger would've liked to strengthen his defence during January, and the departures of Sanchez and Olivier Giroud to Manchester United and Chelsea respectively has strengthened direct league rivals, but on the whole, Arsenal can be very pleased with their January business. "For the life of me, I can't believe he's not gone and signed a centre-half".
"It was a hard deal because Dortmund needed a replacement", said Wenger.
"It's always possible. Will I do it?"
"You have to show them respect, and that you rate the players but as well they have to accept that we live in a competitive world".
"We had Jack [Wilshere] who was sick - I still have to assess him today. Maybe - I don't know", he said.
"He is a typical striker with great pace and a good ratio between games played and goals scored".
"He has committed his future to the club in a period where we are in a tricky position on that front, in qualifying for the Champions League", he said.
"What I expect from him is to lead the team to success [on the pitch]".