Nicklas Bendtner should prepare to tighten his belt after Arsène Wenger announced he will impose a heavy fine on the striker for travelling to Copenhagen and becoming embroiled in an incident that led to reports of the striker unbuttoning his trousers in public before whipping a taxi, rubbing himself against it and threatening the driver.

Before summoning Bendtner to give his own account of what happened outside a trendy Copenhagen restaurant on Tuesday night, where the injured forward had been revelling with friends as his team-mates fought for their Champions League survival away to Bayern Munich, Arsenal's manager said the striker would definitely be punished for his unauthorised sortie.

"I don't know exactly what happened because I haven't spoken to him yet, the only thing that is for sure is that he had nothing to do in Copenhagen," an angry Wenger said. "Nobody gave him any permission to go there so he will be fined for that. Has he created some problem there? I don't know."

It is not the first time that Bendtner has found his extracurricular activities attracting more attention than his performances on the pitch, as a previous holiday in his homeland led to an arrest for drunk driving and a three-year ban and last November he was cautioned by police in Hertfordshire after smashing a door in his apartment complex.

The Dane recently complained that he has been misrepresented by the media as "a psychopath" but Wenger intimated that he has lost patience with a forward who has seldom fulfilled his rich promise during a nine-year spell at Arsenal that has been punctuated with stints away on loan at other clubs.

It looks unlikely that he will play for Arsenal again. Asked whether this week's controversy meant Bendtner had blown his last chance to convince the manager he could come good, Wenger's reply was tellingly curt: "He is at the end of his contract in the summer."