"Of course, they are different positions, so they ask something different from you," he explained. "In [terms of] attacking, and in defence as well.
"I think, as one of the centre-backs, it's more defending, controlling the game, controlling the counters of the opponent. And more building up. So that is basically what your job is during the game.
"I think, as a wing-back, it's more going up and down. So you have more of both sides. A little bit more defending but also you have to be decisive because you come a lot into the last third of the pitch, the last-third part of the pitch. And that asks again something different from you than being at centre-back because then you have to give like an assist or be decisive or give a great ball, where it comes to a chance.
"So, yeah, I think those things are the differences between those certain positions."
Read the interview in full in United Review, Monday's matchday programme.