Michael Ballack has questioned Mesut Ozil's decision to join Arsenal insisting he should have fought to stay at Real Madrid.
The Germany international swapped the Bernabeu for the Emirates Stadium last summer, completing a £42.4 million transfer and signing a contract worth £130,000-a-week.
Ozil arrived at Arsenal as the best No.10 in world football but has failed to live up to the hype. He got his Premier League career of the a flyer, providing an excellent assist for Olivier Giroud against Sunderland. He then scored a brace against Norwich City.
His latest display against Borussia Dortmund was the one of many lacklustre performances and calls for Arsene Wenger to drop him have grown louder. With the likes of Alex Oxlade-Chamberlain and Santi Cazorla vying for a starting spot, Ozil's position in the squad is in major doubt.
For former Germany captain Ballack, Ozil's decision to leave Real Madrid was always going to end in tears. It is widely believed that he was forced out to cater for the arrival of Gareth Bale, but Ballack thinks Ozil should have fought for his right to stay.
He told Sky Sports: " What's happened with him? I don't know. There must be something behind (the scenes) because his head is mostly down, the body language is not improving even with the world champion (medal) in the pocket.
"I don't really know what's happened over the last year since he moved from Madrid to Arsenal.
"A player like him with his ability should have tried to stay longer at Real Madrid.
"That is my opinion. You could see there was a little bit trouble, a little bit moaning. I think he played well but you need time to adapt at a club."
One decision that has left Arsenal fans baffled is his decision to play Ozil on the left flank. The 25-year-old clearly is not comfortable out wide and is struggling to utilise his excellent range of passing as a result.
With Aaron Ramsey filling the role behind the striker, Wenger has decided this is the best way to fit Ozil into the squad. Ballack believes the Frenchman will be well aware of Ozil's strengths and that playing on the wings cannot account for his bad form.
He continued: "When you a buy a player like Ozil you know his strengths and Arsene Wenger knows I think where he is at his best.
"If he (Wenger) thinks he can help the team more as a No 10 I think he would put him at No 10.
"In his younger ages when he grew up from Schalke and Werder Bremen he was mostly in the (centre of) midfield so he felt very comfortable there but in terms of pace he's good on the side as well.
"But, he needs to learn how to defend as well because on these winger positions you need to defend.
"At this level, if one player's out you have no chance."
World Cup blues
Another theory for Ozil's poor form is the fact that he has not had enough time to recover from Germany's victorious World Cup campaign. The playmaker was allowed extra time off, missing the Community Shield tie against Manchester City as well as the opening game in the Premier League against Crystal Palace as well as.
However, it may be the case that the German needs more time off and could do with a break from first team duties. Arsenal's squad is strong enough to cope without Ozil for the time being and, on his current form, may even benefit from his absence.