10:12AM BST 29 Jul 2012
But, speaking ahead of Arsenal's final match of their Asia tour in Hong Kong today, Wenger said: "Hopefully, we will get Wilshere back playing for October.
"With Abou Diaby returning, it will be like signing two new players. This season, the squad will be strong and competitive."
Wilshere, who will reportedly resume light training next month, underwent a procedure on his knee in May, having missed the whole of last season with an ankle problem.
An October return would rule him out of England's opening two World Cup qualifiers against Moldova and Ukraine, which take place in early September.
