Aulas indicated that Spurs have been in contact regarding the availability of the France international, and said the success of the deal now rests with the player.
"I told Hugo today about certain exchanges (with Spurs)," Aulas said at a press conference on Monday.
"Things progressed during these talks but nothing's concrete yet.
"I've informed Hugo of these discussions. We'll have to be a bit patient to find out.
"The decision belongs to Hugo who, I think, will be approached by Tottenham very soon. The clubs' positions have moved closer together.
"It is up to him to decide if the conditions of the transfer are suitable, in terms of what he expects in fiscal and sporting terms."