The 19-year-old is a Mercedes development driver and also drives for the German marque in DTM but has spent the season on loan to Renault where he has served as a test driver.
Wolff has been singing the praises of the Frenchman, and thinks Renault should sign him for 2017.
"Esteban has an impeccable personality - he really is a nice and intelligent young man. And his performance in the car is extraordinary," he told the French broadcaster Canal Plus. "He did two sensational test days with us at Silverstone and we saw that he did the same time as (Kevin) Magnussen in Friday free practice, so he is someone who has a big future."
"I hope that my colleagues realise all of this, otherwise it will be us (Mercedes) who will be taking him back!" the Austrian joked.
Bahrain International Circuit - Winter testing