“But Feyenoord was against it. They just didn’t want to sell him in this transfer window and will look at it this summer.”
Nissen also suggested that, regardless of Feyenoord's reluctance to sell last month, a transfer is likely to be completed in the summer.
“That Nicolai is so important to them that they have that stance, that says everything about how much they value him," he said.
“It is pleasing but also deserved.
“At that time they were also looking forward to playing the Champions League for the first time in many years.
“That was also nice enough because Nicolai was well suited to the club after his great season as top scorer and did not really want a change.
“But now he’s ready to take next step. It’s always a balance to find the right time to go on, but I think we’ll find a solution this summer. Feyenoord has also had time to look for a replacement.”