COMMENT: Need to know what Unai Emery is facing down at Arsenal? Just consider that tweet. That social media post from Mesut Ozil less than 24 hours after the bemeaning in Borisov...

That it was Ozil, well, that was to be expected. Left at home by his manager. Seeing his teammates beaten - humiliated - in Belarus. There it was. A clear 'I'm still here' and 'ain't going anywhere' message.

Quoting Dennis Bergkamp, Ozil posted: "When you start supporting a football club, you don't support it because of the trophies, or a player, or history.

"You support it because you found yourself somewhere there; found a place where you belong."

Passionate. Committed. From anyother player, this would come across as a rousing call to fans. But Ozil isn't any old player. He's the highest paid in the club's history. His manager cannot trust him in away games. And he's been urged since Christmas to find himself a new club. This was as clear as a crisp spring morning in Minsk. Ozil isn't about to be pushed out.

But as mentioned, this was to be expected. He turned down PSG last month. He did the same with Inter Milan. For now, despite the stand of Emery, Ozil won't consider leaving. Particularly when it means losing over half the current £350,000-a-week wage packet Ivan Gazidis, now happily away at AC Milan, handed over to the German last season.

But the politics. The passive aggressive actions so typical of social media. Coming from Ozil. Today's Ozil. It's no surprise. And it wouldn't have been for Emery.

However, it's the reaction of Ozil's teammates. Those who were on the pitch at the Borisov Arena. It was their reaction to the post which really affirms the culture battle Emery is facing.

And it is about culture. A club culture. One which says it's okay, after a dismal away result, to get on your phone and post approvingly to a message from a teammate clearly at odds with the manager. A culture that has no room for how such a reaction is perceived by the support, or the press. And a culture which either doesn't consider - or care - about what the manager is going to have to confront at his next media conference.

Alex Iwobi and Granit Xhaka both responded positively to the post. Sead Kolasinac, it has been claimed, also 'liked' it. All three were in the starting XI at BATE Borisov. But instead of getting their head down. Trying to figure out why it went wrong the previous night. They were posting little emojis from their little phones. Either oblivious or insensitive to how their actions would be interpreted.

Now we have a story. Now we have a split locker room. One where there is a clique behind the popular Ozil - and against the way he's been handled by the manager. A manager who for Thursday's return-leg at the Emirates will have a pre-match presser dominated by questions about his relationship with his players. Whether it was intentional or not, this will be the result. It already is online and this will filter through to the red tops in the coming days.

This is the battle Emery is fighting. A team standing on the shoulders of giants. Of men like Tony Adams, Patrick Vieira and Frank McLintock. Now, despite the attempts of Emery, we still have the selfie boys. The team that never grew up. One that's more Fortnite than fortitude.

And this is what Emery is attempting to dismantle. Winning papers over the cracks. It excuses the culpable. But now they're in a slump. Slipping out of the top four and teetering on elimination from Europe. This is when unity is needed. Leaders are needed. And responsibility embraced.

The responsibility that recognises the ramifications of what you do online. The responsibility you have to your club. To your manager.

Whether it was deliberate or careless. Emery was let down on Friday. By the long-standing culture at Arsenal and the players who still revel in it. The battle to be rid of it will be no quick fix.

'When you start supporting a football club, you don't support it because of the trophies, or a player, or history, you support it because you found yourself somewhere there; found a place where you belong.' || #DennisBergkamppic.twitter.com/kKM8kDhm8T — Mesut Özil (@MesutOzil1088) February 15, 2019