Pavard has gone to bayern.At this point with TAA due to miss at least a month due to injury, I'd go for a hybrid CB/RB player.
Topping my list would be Benjamin Pavard who played well in the World Cup as well as Joshua Kimmich. Pavard can play RB/CB whilst Kimmich can play RB/DM.
If we can't get a top class target, I'm ok with going for a relatively cheap stop gap player until our starters can return to fitness. I believe Klavan was ok in limited minutes. Maybe another player of his ilk to just shore up the defence for now.