He insisted again that his midfield maestro will not be leaving for Chelsea.
"I believe Daniel is meeting Luka tomorrow," Redknapp told the London Evening Standard.
"It's difficult when crazy sums of money are being bandied about but we need to keep Luka and all our best players if we are to improve.
"If we want to continue to challenge the top clubs in the Premier League then we simply have to get stronger - not weaker.
"Luka is a fantastic player and we need to keep him at the club. We certainly don't want to sell him."