Compatriot Mesut Ozil and Greece international Sokratis both reached similar arrangements last week allowing them to sign as free agents for Fenerbahce and Olympiacos respectively.
Brought in from the cold following Unai Emery’s exit, Mustafi was a mainstay of Mikel Arteta’s side in the closing stages of last season until injury robbed him of a place in the FA Cup final starting lineup.
It’s believed the club held talks with the 28-year-old about a contract extension – quite a turnaround given he was told he could leave 12 months prior – but the player made it clear that his future lay elsewhere.
Despite this window being the last chance to get a fee for Mustafi, Arteta said 11 days ago that he expected Mustafi to stay until the end of his contract while the dust settles on other departures.
With Rob Holding, Pablo Mari, Gabriel, David Luiz and Calum Chambers still on the books, it’s possible the boss may be reassessing the situation given the arrival of Martin Odegaard will again tip us over the non-homegrown player limit.
Mustafi won’t be short of suitors should he get his wish to leave. Barcelona were sniffing around and there’s thought to be interest in Italy where he played previously for Sampdoria.