Let me explain. Alaba doesn't really want to play at left back, and Bayern got a really good season out of Bernat there in the end. In midfield, it is very congested. I'd say Lahm is a sure starter, and I also think Xabi Alonso is. Then there is one spot open, and I'd bet my life on Guardiola preferring his compatriot Alcantara to Alaba. Bayern COULD be open to a sale for a big bid, and Alaba COULD be interested if the plan was to play him in central midfield.