“No, there is no sum or figure. For me, he has the highest value," said Farke.
“I am not naïve. If Barcelona or Paris Saint-Germain want to buy him there can be a solution but he has been outstanding.
“For me, one of the best players in the Championship.
“He is nominated for the best young-player. I have asked him is that just a category for him because it should be the best player, not the best young player. He should be nominated for one of the best players.
“His value is unbelievably high but it is not for me to talk about a sum.
“That is a topic for the board and our sporting director.
“I don't want to speculate about a sum. If we have the chance to keep him, we will try to do that. There is no sum, £40m or whatever, no chance."