Mate, of course, if he isn't familiar with the position then he won't play there at 100% of his ability.
In order to avoid such situation, for example, I usually have 2 main players for DL position that I rotate heavily and I also have a left footed player for Box To Box position that trains DL position and I also have a left footed player for Central Defender position that trains DL position so at least 4 players can play DL position in my team and the same I do for every position in the tactic, I try to have at least 4 players backup for every position.
For example, my player at ML position, trains ACM or STC position to play there when needed and my central defenders train CM position to play as CM(D) when needed.
thanks alot for the info mate, so would you say that pogba can play in the dl position?