Agree, but here it's not just Dunk and Duffy, they've also formed a triumvirate with Ryan too, constantly covering for each other, fist-bumping and encouraging them along. Those three are also really developing an understanding of what each can (and can't) do.
Agree with this. That Sanchez looks like the best 20yo CB I've seen for so long that I can't think anyone to compare him with. And under Pochettino he's only likely to get better, as he's even better a defensive coach than Hughton.