Modric is desperate to move to London rivals Chelsea but Spurs are determined to hold on to their man and have rejected bids of ?22million and ?27million for the player.
Media reports this morning claim the 25-year-old has put in a written transfer request to try to force through a move, but Redknapp insists any such move would have no change on the club's stance that he is not for sale.
Redknapp told BBC Sport: "We know he wants to leave and whether he writes it down on a piece of paper doesn't really make any difference to our stance.
"He's a great player and we don't want to lose him."
Source: Team Talk
Source: Team Talk