Queens Park Rangers have recently been strongly linked with a move for the Croatian playmaker.
But Redknapp insists the 27-year-old is key to his plans at White Hart Lane.
“No chance. I wouldn’t sell Niko,” said Redknapp. “He might play Sunday (against Manchester City). I love Niko – he’s a real footballer, a good player.
“He’s just been unlucky, but he’s important to me. You could say ‘well, why don’t you play bloody play him?’ But I’ve got Gareth Bale. It’s been hard to get him in the team.”