However, reports in Holland claim that a deal for the Belgian defender has hit problems due to an agreement between the player and Ajax.
It is claimed that the 25-year-old, who has 12-months left on his current deal, would be due a percentage of any transfer fee - but sources suggest Ajax are not willing to pay this.
Ajax, though, insist that talks are ongoing and despite the fact they wanted a quick resolution - there was no fresh news on the situation.
"We all hoped for a rapid agreement between Tottenham Hotspur and Ajax and Spurs and Jan Vertonghen," Ajax financial director Jeroen Slop told De Telegraaf.
"It's in its final stage, but in our opinion there is still no concrete news."
The player's agent Mustapha Nakhli called on Ajax to make the deal happen.
"Jan Vertonghen has always stood by Ajax, and he expects that the club does than now," Nakhli also told De Telegraaf.