Former Germany defender, Thomas Berthold, is the third person to warn Arsenal about Pierre-Emerick Aubameyang’s behaviour.

With talks between Arsenal and Dortmund over the £60m move of Aubameyang reportedly well under way, another person has come forward to warn us about the risk the 28-year-old poses.

“At Dortmund, it has reached the point where the employer has said to its ­employee, ‘My friend, it’s over’,” said Berthold, who played for Germany between 1985-1994.

“For Arsenal, it is now a ­question of how they structure the handling of their players. Aubameyang presents a risk.

“They must have a code of behaviour for the team – both on the pitch and away from it – so that Aubameyang can carry out his profession with 100 per cent focus and not have anything in his head that can provide a distraction.

“The mentality in England is different. But, in Dortmund, it has been a problem.

“Aubameyang got used to a certain lifestyle with his ­escapades. He will have to adopt a different way at Arsenal. I hope they know his ­personality and how he works.

“I assume they do and they understand what he is about on the training pitch. If they don’t, his mentality won’t fit and it would be better that the deal doesn’t go ahead ­because, in my opinion, it would not work.”

Eintracht Frankfurt coach Nico Kovac and Bayern Munich manager Jupp Heynckes have both already spoken out about their concern over Aubameyang’s behaviour.

Arsenal know exactly what it’s like to have a threat posed to the harmony of their squad by a disruptive player.

Alexis Sanchez’s obvious desire to leave understandably unsettled the other players.

Therefore, while Aubameyang is moving in the other direction and coming to Arsenal, I’m sure Arsene Wenger is aware of the Gabon international’s reputation.

Sven Mislintat, who was at Dortmund with the player, is even said to have reassured the boss that Aubameyang won’t cause any problems.

The striker was apparently late to training three times this season and failed to turn up for a team meeting earlier this month, which saw him suspended for Dortmund’s clash against Wolfsburg.

Honestly, I’ve got to the stage that while I don’t want a complete d***head in the squad, we need quality. Although he’s apparently been inconsistent this term, he’s still scored 21 goals in 23 games and we need that kind of killer-instinct at Arsenal.

I’m sick of us signing ‘nice’ players who won’t cause waves and then getting bullied by every other Premier League team because we let them.