However, he insists there's been no official discussion about the Brazilian.
Cardoner said, "Neymar wants to return and has said so, but the issue has not been placed on the table.
"It is not correct that Barcelona is worried about the signing of Neymar.
"Actually it is an operation that we have not addressed, we do not know if it will come to fruition."
Cardoner admits there's still some bitterness over the manner of Neymar's departure two seasons.
"There are things that I still do not understand about the departure of Neymar from Barça. We have transmitted the will to return the player, but we would have to study many things and change the scenarios to consider something.
"He is a great player and I already made an assessment of his progress in his day. Now we cannot make assessments."