We don't need a left-back. We've Chicksen to start the season with, Calderon and Hughes who could do a job there. And if it's clear we need to improve the position they'll almost certainly be a Premier League club willing to loan us a youngster after the transfer window closes.
It might not just be us that's stalling the deal. If we bought him and agreed a deal, he'd still need to sort out his contract with them, which as they are desperate to get rid off him (and you could argue treating him pretty poorly) could put him in a strong position and want to get us much...
What scouts are going to be more impressed in his performance in an U21 friendly than being one of the best players in the team that finished 6th last season?