Jurgen Klopp has been hit with a touchline ban after his outburst in Borussia Dortmund's UEFA Champions League defeat to Napoli.
And the Dortmund coach could yet see the sanction extended, with UEFA due to discuss his punishment further next month.
Klopp was sent to the stands in Dortmund's opening Group F meeting with the Italian side after reacting angrily to the decision not to let Nevan Subotic return to the pitch in the build-up to Gonzalo Higuain's opening goal.
The German side ultimately fell to a 2-1 defeat, with the coach apologising during his post-match press conference for his outburst.
"I have to take the blame, that was just dumb," he said.
However, despite his apology, he has been handed a punishment by UEFA and will now miss the clash against Marseille on 1 October.
And a UEFA spokeswoman confirmed that there could yet be further action to follow.
She was quoted as saying by ESPN: "A decision about a possible extension of the ban will be made by the control and disciplinary chamber on October 2."
Western Sydney Wanderers must overcome an unprecedented losing streak
and one of the most tumultuous periods in its brief history if it wants
to extract something from its historic AFC Champions League game on