braineclipse
Steve Sedgley
I'm not sure if Lahm is up to the task of running the line any more. He's not played RB consistently for over a year, and fitting back into his old role is something he has said himself is not the easiest thing to do.
He's at least as up to the task as Boateng is I think, a player whose also been playing a different position to that consistently for longer than Lahm has been a central midfielder. With Mustafi out injured (I assume) and Hummels hopefully back for the Germans Boatent returning to right back seems like the obvious choice for Low. The other options are probably Grosskreutz who also isn't a natural right back and Durm whose played most of his Bundesliga football at least as a left back. I suppose Howedes could be shifted across as he's more comfortable at right back than at left back if Durm comes in, but Durm is a 22 year old with one cap...
No perfect option, for me Lahm seems to be comfortably the best option.