Wenger feels the Pole has improved his focus.
“He has improved in his focus, the consistency of it,” said the Frenchman. “The talent was always there but he is maturing quickly.
“You can’t be completely on the inside or completely on the outside. I like that he is a good communicator. You have to adjust, it’s important to find a balance.
“The mental part of a keeper is vital. Look at Joe Hart, who is a fantastic goalkeeper for England. For me he shows that strength.
“I wouldn’t like to say publicly what he [Szczesny] needs to do to improve, I’d rather tell him myself. Overall he has the basic talent to be a top-class keeper, how far he goes will depend on how much he wants to improve.”