Mesut Ozil's knack of going missing in big games was once again on show during Sunday's disappointing north London derby defeat to Tottenham.
Whereas Christian Eriksen put in yet another impressive performance at White Hart Lane, the German made very little impact and only seemed to come alive in the last 10 minutes.
Questions are now being asked about his commitment. Since the turn of 2017, Ozil has been awful and recorded just two goals and three assists in the Premier League.
His dour displays have been a catalyst for Arsenal's poor form recently, which finds them sixth in the table and six points behind the top four.
And yet, according to the Daily Mail, he is still demanding a brand new £300,000-per-week contract to stay at the Emirates Stadium.
Doubts are also starting to creep in over Ozil's status as a world-class player. In stark contrast to last season, the 28-year-old is struggling to dictate games for Arsenal in the No.10 role.
So why is that? A number of factors can be blamed for Ozil's dramatic loss of form, such as Arsene Wenger's future and his own, but it's ultimately down to him to prove his doubters wrong.
What he certainly doesn't need right now is bad publicity away from the football pitch, but that's exactly what he's getting following Sunday's damaging defeat.
According to various sources, Ozil reacted angrily to being selected for a drugs test after the Tottenham game by kicking a door in anger and leaving stud marks.
He eventually agreed to take the test but only after making a scene.
However, a fresh update has now emerged, per the Evening Standard, revealing further details of how exactly Ozil reacted to being chosen.
They claim that the Germany international actually turned to Arsenal's doctor, Gary O'Driscoll, and told him to "f*** off" before refusing to participate. Unacceptable.
Ozil might have been frustrated with losing 2-0 to Tottenham, but there was no need to take it out on O'Driscoll, who was just doing his job.
The playmaker's bad behaviour could land him in hot water with Arsene Wenger, who won't take one his players disrespecting a senior member of staff lightly.
What's most bizarre about Ozil's actions is that he seems to show more fight behind the scenes than on the pitch. If only he had used that aggression to help Arsenal beat Spurs.
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