19-year-old Sainz is Red Bull's top junior driver outside the F1 ranks. He currently leads the Formula Renault 3.5 standings and already has experience of grand prix machinery having tested for the senior squad and Toro Rosso.
Reports this week have linked him with a spot at Caterham, who recently underwent a management change, and now the Spaniard has told reporters in his home country that a deal is being discussed.
“Yes, it is true that there have been talks with [Caterham], but there is nothing confirmed," he told the AS newspaper.
“It doesn’t change anything for me because my goal remains the same: to be at Toro Rosso in the future. If for that to happen I pass through Caterham then I do so happily. It has been possible to race this year [in FR3.5], but Red Bull is the one who decides. They and Caterham must also benefit and reach an agreement.”
Sainz added that he would view a Caterham seat as positive for his development.
“Getting F1 kilometres under your belt always helps, no matter how good the team is. If they have considered it for me, it’s a good sign that I’m doing things right.”