The winger remains a big money target for Manchester United, though BVB directors are insisting he now won't be sold.
Delaney says: "We have better opportunities when Jadon stays. He is one of the best players in the Bundesliga. One just has to look at his goals and assists last season.
"He's still very young and I do not know if he will get even better. But I expect a lot from him next season.
"He's just extraordinarily talented."