Wenger was steaming after learning Bendtner gave Bolton the Gunners team three hours before kick-off on Saturday.
It is believed the striker spilled the beans to Bolton ace Fabrice Muamba, an old pal from the youth ranks.
An Arsenal insider told The Sun: “One of Bolton’s staff told Arsene after the game they knew their team well before the team sheets were handed in.
“When Arsene asked how that was possible the Bolton coach replied Bendtner told them.
“Goodness knows the trouble Nicklas would have been in if he hadn’t scored the winning goal.”