Arsene Wenger has been handed a two-match ban from UEFA for breaching the terms of a previous Champions League suspension.
Wenger was hit with a suspension following last season's defeat to Barcelona in the Champions League and as punishment he was made to sit in the stands when Udinese travelled to the Emirates for the play-off first leg last Tuesday.
Under UEFA rules, a coach serving a touchline ban can have no communication with his bench but Wenger appeared to be passing messages to his team via a third party during the 1-0 win.
UEFA opened disciplinary proceedings against the Frenchman and after reviewing the case they have found him guilty of failing to abide by UEFA rules surrounding his original ban.
A two-match suspension has been imposed, while Arsenal have been fined €10,000 for the improper conduct of their officials.
"The UEFA control and disciplinary Body has suspended manager Arsene Wenger from carrying out his duties at Arsenal FC's next two UEFA competition matches.
"Today's decision was taken in relation to the Arsenal manager not abiding by the decision of the control and disciplinary body during the English club's Champions League play-off game against Udinese last Tuesday, August 16," a UEFA statement read.
"Wenger is therefore suspended for Arsenal's second-leg match against Udinese in Italy on Wednesday and then the next UEFA competition fixture for which he would be eligible.
"The control and disciplinary body has also decided to fine Arsenal 10,000 euros for improper conduct by its officials. An appeal may be lodged against these decisions within three days of the dispatch of the reasoned decision."
Wenger claimed UEFA had given him permission to pass instructions to assistant manager Pat Rice through first-team coach Boro Primorac, but the European football's governing body insists this was not the case.
"The UEFA disciplinary regulations stipulate that a manager may not communicate with his team during a fixture for which he is suspended and may follow the game from the stands only," the statement continued.
Wenger and Arsenal have the right to appeal the decision.