Celtic manager Ronny Deila insists Virgil van Dijk does not want to leave the Scottish Premiership leaders in January.
Celtic boss Ronny Deila says keeping his best players will take priority over acquisitions in the transfer window.
Hannover director of sport Dirk Dufner has closed the door firmly on the sale of Mame Diouf, declaring the Senegalese striker priceless.
Interest is growing in the former Manchester United forward after he scored 12 goals for the Reds last season, but Dufner insists he will not be sold at any price.
"We are certainly not going to sell him," he told Kicker magazine. "He is definitely staying with us."
The 25-year-old still has a year left to run on his contract with the Reds and Dufner is keen on extending that deal rather than contemplating losing him on a free transfer next summer.
"Mame is happy in Hannover and we hope to reach an agreement," he said.
Diouf joined Hannover from the Red Devils in January 2012 and he has scored 18 goals in 38 appearances for them.