Just Arsenal has posted a blog that makes some of the very points about lack of sourcing that I often make on here myself. And it uses this very rumor as an example:
A little bit of research goes a long way, it is fairly easy to find the original source of a piece of gossip. Providing attribution is standard practice these days, as an example today the Metro published an article claiming Matteo Guendouz can convince Alexis Claude-Maurice to sign for Arsenal. The Metro links that claim to a report in the Mirror and there it ends in terms of attribution and so, the original source can be assumed to be the Mirror.
The next step is to analyse the article in question, looks for quotes, sources or even why they are making the claim they are making.
Well, the Mirror has no quotes, no sources, named or unnamed and on the face of it the only thing that comes close to backing up their claim is that Matteo Guendouz and Alexis Claude-Maurice previously played together.
That tells me that it is just an opinion piece dressed up as speculation and therefore practically worthless and that took me less than three minutes to work out.
We was first linked to him a month ago by a supposedly reliable French journalist who covers Lorient.