Croatia midfielder Modric has been in scintillating form for Spurs this season, playing a key role in their run to the Champions League quarter-finals on their debut in the competition.
The 25-year-old has been linked with a host of rival clubs, including Chelsea, Manchester United, Juventus and Inter Milan.
Star man: Midfielder Modric (left) has been in fine for for Spurs both at home and in Europe this season
But speaking to Croatian newspaper Sportske Novosti, Redknapp said: 'I wouldn't want to sell him for ?100million, not even for a billion. He's the hub of the team.'
Modric signed a new six-year contract contract with Tottenham last summer and his agent Mario Mamic dismissed speculation about a move away.
'These are just rumours,' he told Calcio Mercato. 'Luka has a contract until 2016 and Tottenham have no plans to sell him.
'He has an excellent relationship with the coach, Redknapp, and only signed a contract extension with Spurs last summer.'
He's mine: Redknapp will hold on to Modric
Modric is one of a quartet of Croatia internationals currently on Spurs' books but he could be the only one left next season.
Midfielder Niko Kranjcar has already confirmed he would look to quit the club in search of regular football, while there is also doubt over the future of right-back Vedran Corluka.
Redknapp said: 'Niko's a great player and a great guy, very polite, but the guy just has no luck.
'I don't want him to leave the club - he was fantastic last season - but we've got Gareth Bale out on the left of midfield.
'Believe me, he'll be back in the team. I don't know when, but he will be back.'
He added of Corluka: 'I would be sorry to lose him. He's a really upbeat guy, always does what I ask him, but unfortunately he suffered the injury in that stupid challenge from (AC Milan's Mathieu) Flamini and it ended that great run of form he was in.'
Goalkeeper Stipe Pletikosa, meanwhile, has made just one appearance since joining on loan from Spartak Moscow.
Redknapp said: 'Pletikosa has been really good in training, but what I would say is, what would you do in my position if you had Heurelho Gomes? Gomes is in great shape, and you can't play everyone.'
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Source: Daily Mail
Source: Daily Mail