Spurs boss believes the midfielder is good enough to play for the likes of the European champions, but insists that the north London club are trying to convince him to stay
The 25-year-old's future has been the subject of intense speculation, with Chelsea reportedly having a second bid of £27 million turned down by Spurs for the midfielder.
Tottenham have so far been resolute in their stance that they would like to hold on to their player, and now Redknapp insists that the club's chairman, Daniel Levy, is working hard to bring in some big names to convince Modric to stay at White Hart Lane.
"I can understand how Luka feels in all this," Redknapp told The Sun.
"If anyone offers to treble your wages you'd be interested and Chelsea are a big club.
"Everyone wants Luka. Just ask [Manchester United boss Sir] Alex Ferguson what he thinks of him, ask Roberto Mancini at Manchester City - they all want him. He could play for Barcelona.
"Luka wants the chance to win things and he is ambitious. All I'll say is that we are too at Tottenham.
"It's early days in the transfer market and no one is more ambitious than our chairman Daniel Levy.
"Luka wants to know that we'll be right up there challenging next season and we are working hard to bring in a couple of big signings that may convince him to stick with us. I hope so.
"I have sympathy for Luka and his character has shone through in all this.
"He's a fantastic bloke and a genius of a player. I'd just ask him to be patient."