Borussia Dortmund sporting director Michael Zorc has suggested that he has been left frustrated by the recent behaviour of Pierre-Emerick Aubameyang.
On Sunday, Aubameyang was left out of the squad to face Wolfsburg after missing a team meeting, and the Gabon international's absence was not as a result of his first disciplinary offence.
Aubameyang has been linked with a transfer to either Arsenal or the Chinese Super League, but Zorc has indicated that he has been left surprised by the striker's conduct.
The 55-year-old is quoted by Sky in Germany as saying: "At some point you reach a point where you can no longer tolerate it. That's the stage we are at now and I don't know what is going on inside his head.
"We have had a conversation but I haven't seen this kind of behaviour from him for years. It is clear that he can't continue like that and what is happening now won't be tolerated by the club.
"What I don't understand is that he's a good guy and is in a good mood most of the time so I don't understand why he did it."
Despite his off-the-pitch issues, the 28-year-old has still scored 21 goals in all competitions this season.
