Marc-Andre ter Stegen (Girona)

The biggest question mark of all probably hangs over 33-year-old keeper Ter Stegen. Nagelsmann has repeatedly said that the former Borussia Monchengladbach man would be his No1 if he re-established himself at club level and performed well, but Ter Stegen has been sidelined by back problems for much of the season, restricting him to one solitary appearance for Barcelona so far.

As Barça seemingly no longer regard him as their first choice, he has been loaned to fellow Catalonian outfit Girona to give him some much-needed game time and the opportunity to impress Nagelsmann. If he can, the experienced shot-stopper could still be an option for Germany, but time is running out.