The Dane scored in victory over Hull City last bight.
Wenger said: "It was a good performance from Nicklas. He has come back and worked hard on training. I know he has the qualities to play for us and he showed that tonight.
"When he has that type of attitude and commitment it shows that he has the qualities. Much depends on his commitment and fitness. He has worked hard recently but when he is physically sharp he can compete with anybody."
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