He acknowledges that the intricacies of Popovich 's defensive scheme occasionally leave him out of position .
But Bertans will have to improve defensively to carve out a role in this season 's playoffs .
Bertans acknowledges that the intricacies of Popovich 's defensive scheme occasionally leave Bertans out of position .
But Bertans will have to improve defensively to carve out a role in this season 's playoffs .