Following fan favourite Lukas Podolski's struggle for game time at Arsenal last season, Turkish giants Galatasaray jumped at the opportunity to acquire his services.
His departure from north London left a selection of fans frustrated and confused, also leaving behind a vacant number nine shirt.
Most thought that a new striker over the summer was to fill Podolski's boots and inherit the famous shirt, yet this was not meant to be.
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However, in a strange turn of events, it appears one of Arsenal's current players has taken on the vacant number - Jack Wilshere.
In a video uploaded onto Arsenal's official YouTube page (as shown below), the Englishman can be seen wearing a jersey sporting the number nine, as opposed to his usual number ten.
Now, it’s unheard of for squad numbers to be changed mid-season, suggesting there was either a mix up in the changing room or the England international requested a number nine jersey for whatever reason.
It's interesting to note, though, that Calum Chambers, Hector Bellerin and Per Mertesacker all feature in the video wearing their regular numbers of 21, 24 and 4 respectively.
So, what could this mean?
Well, funnily enough, Arsenal have only been linked with a move for the world's greatest number ten recently - Lionel Messi. Of course, it's a transfer rumour that most football fans will shrug off without really dwelling on.
But can two and two be put together? Have Arsenal taken Wilshere's number ten shirt away from him in order to accommodate THE Lionel Messi? Or is it just a slow day at the office?
It's most likely the latter. This isn't the first time the Barcelona star has been linked to Arsenal, though, with previous reports suggesting the forward asked Cesc Fabregas about his time with the Gunners.
The mystery remains, then. Why was Wilshere wearing Podolski's old number? Has be abandoned the number ten jersey in replacement of someone else? Or did he just fancy wearing a different number for once?
All questions likely to be asked by Arsenal fans clutching at straws in the build up to the winter transfer window, but whatever the verdict, it remains the case that Messi arriving at the Emirates and handed the number ten shirt is far from likely.