Michael O'Neill says team selection will come down to the opposition Northern Ireland are facing as he looks to accommodate talented young defenders Trai Hume and Conor Bradley.
The duo have both had impressive seasons - Bradley on loan at Bolton, and Hume in his debut campaign with Sunderland following his switch from Linfield.
With both playing on the right-hand side of defence there are fears it could develop into a similar situation as Scotland with Andy Robertson and Kieran Tierney fighting it out for one left back berth.
