There are unconfirmed reports that the trio have left Tottenham's training camp in Spain to sort out there futures.
It has been claimed Sunderland are also after Younes Kaboul but they will have to find another £6m to get the defender.
Manager Roy Keane has already declared an interest in signing striker Darren Bent and made a £12m offer for him last month.
Sunderland depart for a pre-season tour to Portugal today and Keane said: "The next few weeks are massive for us. This is a big summer for Sunderland. I am looking at five or six players to take us to the next level."