"My conscience is very calm because I have been really fair," said Arteta.
"What I can say from my side is that it is just a football decision. My level of communication with him has been really high and we know what to expect with each other.
"Obviously a player of that dimension, with the career he has had, everything that happens around him has a big impact. It has been the case for the last eight years, it is nothing new that is just happening now. A lot of things have happened over these eight years.
"My job is to get the best out of every player, to contribute to the team performance.
"Here I feel at the moment, today, that I have failed. I want the best possible Mesut for the team. And in some moments I was able to get close to that, and at the moment I have not been able to do it because I have to make the decision to leave him out of the squad."
So unless Arteta is lying to us, it was a footballing decision from his side of things. Lines up with The Athletic article.