Well, the official statement regarding Costa doesn't say anything about the conditions after which the transfer becomes an obligation. Still, I don't see us wanting to harm relations with Bayern with not buying Costa. However, if he flops here we can at least negotiate the fee. All in all, even if we end up paying 46mln for a highly rated winger in his prime age it's not a bad deal. Especially since the payment is delayed by two years.
Regarding our mercato in general, every summer the reports are not in our favor and yet we always get stronger. I believe this year will be the same.