He told Boyle Sports: "I remember during my time we had Gary Neville, or on the other side Ashley Cole, if they were not available it created a problem. But here if one or two right-backs are not available, you can easily put one in.
"I guess I'd start with Alexander-Arnold or Kyle Walker, one of them.
"Trent is a fantastic attacker of course, great crosses and a great right foot, extremely good right foot.
"As a defender he's not the best in the world but of course if you play for Liverpool, attacking, attacking, they maybe don't need that.
"I think it very much depends who the opponent is. For example Brazil, where you will probably not have the ball as much, maybe then you put in one who is stronger defensively."