The 20-year-old has been sidelined for 14 months following a series of injuries, which caused him to miss Arsenal's Premier League campaign, Euro 2012 and the Olympics.
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"We need to manage him well. He needs a few games in the reserves. Wilshere had ups and downs. He was focused, especially in the last three months. We have to be a bit cautious," he told reporters.
"When you're so young and you're out for 14 months, it's a good test for your mental strength."
Wenger also announced last week that Emannuel Frimpong has resumed training, and says that he could play much sooner.
"He's a bit in front of Jack on match fitness. He could play tonight for reserves," he added.