Andrew Robertson said both he and fellow left-back Kieran Tierney were played out of position in Scotland's loss to Israel.
Alex McLeish's side were ahead but fell to a 2-1 Nations League defeat on Thursday, with John Souttar sent off.
The Scotland boss opted for a 3-5-2 formation, leaving no room for an orthodox left full-back.
Liverpool's Robertson played in a wing-back role and Tierney, who scored a decisive own goal, featured on the left side of the back three.
"Both of us are out of position," captain Robertson told the BBC.
"So it's two positions we need to try and learn.