Tottenham should give Toby Alderweireld an improved contract or allow him to leave the club, according to the defender's advisor.
Alderweireld, 28, is one of the only members of Spurs' first-team not to be given a contract extension in the past 18 months and in July he said there was no update on talks to extend his current deal, which expires in 2019.
That contract reportedly contains a clause stating that Alderweireld can leave for a fee of £25 million if Spurs trigger a year-long extension in 2019.
Alderweireld's advisor, Stijn Francis, says Tottenham must offer the Belgium centre-back the deal he deserves or a transfer to another club.
"Toby is always good," Francis told Niewsblad. "Even after his injury he recovered well -- Tottenham's statistics fell sharply during his absence. If you only look at his figures, Toby is impressive. And for his performances, he deserves either a correct contract from Tottenham or a transfer.
"For a transfer, you know that he can only leave Tottenham for seven or eight teams. Almost all the other top clubs are interested in Toby. There are not a lot of central defenders of his kind so they are sought after. But those clubs also know that they have to negotiate with [Tottenham chairman] Daniel Levy."
Tottenham manager Mauricio Pochettino hinted last month that Spurs would open talks with Alderweireld after the close of the summer transfer window, and said the club-record signing of centre-back Davinson Sanchez had nothing to do with the Belgian's future.
"It [Sanchez' signing] is not related," Pochettino said. "Today, I was talking for one hour with Toby. He is so happy here. The club now is so busy trying to add more quality to the team. It's true that Davinson is more competition for our centre-backs but it can only be good.
"No doubt, when the window finishes, Daniel will try to work and make happy every single player of the club."