BvB have it very wrong if they think dembele will sit quietly if they don't sit to negotiate.
His dream club who have a vacant spot for him now are just about to offer 100m euors for him, That's 7x times the amount BvB spent on him, nearly 90m profit in a single year!.
Since this should be a win-win situation for both parties, BvB refusal won't sit well with dembele, I'll be fuming in rage if that happened to me, And i have no doubt he'll push very hard for a transfer, Let's remember he's been in dortmund for a single year, He doesn't owe them a loyalty perk yet.