Wenger was seen passing messages to one of his coaches during the first leg at the Emirates Stadium while serving a ban stemming from last season. And UEFA has handed down the suspension despite the fact that Wenger claims he was told by a UEFA official that he was doing nothing wrong.
A statement from UEFA on Monday read: "The UEFA Control and Disciplinary Body has suspended manager Arsene Wenger from carrying out his duties at Arsenal'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 UEFA Champions League playoff game against Udinese last Tuesday, August 16. 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."
Arsenal has already said it will appeal the decision, while the club has been fined $14,000 for the incident as well.