Former manager Harry Redknapp insists Luka Modric is "irreplaceable" for Tottenham as the playmaker continues to be linked with Chelsea, Manchester United, and Real Madrid.
Chelsea failed with several bids to sign Modric last summer, with Tottenham chairman Daniel Levy insisting the Croatia international was not for sale "at any price" after rejecting a £40million bid from Stamford Bridge while Redknapp was in charge at White Hart Lane.
Levy faces a tougher task to keep Modric at the club next season, with the 26-year-old thought to be preparing to hand in a written transfer request in the coming days.
And Redknapp, who was sacked by Spurs earlier this month, believes Modric would be a huge loss to the club.
When asked if he believed the midfielder would leave north London this summer, Redknapp told Sky Sports News: "I don't know. I wouldn't be sure about that.
"It would be [a huge loss]. He is irreplaceable. But if they get massive money, they can go and get three or four players and improve the team in other areas."
Redknapp went on to again discuss his disappointment at being sacked by Levy, despite having led the club to a top four finish in the Premier League for the second time in three seasons.
"I would obviously love to have stayed," he added.
"Things were going well. There was no hint of me leaving, to be fair.
"But it is up to the chairman and the owner. It is their club, if they feel they want to go down a different route.
"Maybe they want to get someone in where they can get more people involved in who they sign and who they do not sign, that is up to them. It is their club."