Speaking at the Gunners press conference this morning, Wenger responded to photos of the England midfielder holding a shisha pipe at a nightclub which were posted on social media earlier this week
"I have spoken with him about that
He is not a smoker, He is sorry about what happened, but he has to master his own life," said the Arsenal manager.
Wenger continued: "When he is here, he has to follow the rules
This photo has been taken at half past 12 after the Superbowl
I dont know what happened really.
"Away from the club, it is his responsibility to master his life."
Wenger said Wilshere always behaved in a professional way at the club.
"You have been 20 (years old), sometimes you need to ease the pressure," he said.
"Today, everywhere you go people make photos, but one second of your life does not define who you are."
Source : PA