Carlos Sainz has "a smile on my face" after keeping a close eye on Renault and the progress they have made with developing their car.
The Spaniard's wish to move on from Toro Rosso has finally been granted and he will join Renault next year on a year-long loan whilst remaining part of the Red Bull family.
"I’ve seen that a lot of time Renault has been the fourth-fastest team this year," Sainz told GP Gazette.
"And what I’ve also seen is the development they’ve had during the season, which also creates a smile on my face, because I know how much they’ve developed and how much effort they are putting into everything.
"I follow them very closely because they also have the same power unit as us [at Toro Rosso]. I know the progress they’ve made.”
While Sainz has not got the move he wanted to Red Bull just yet, he still feels he is making a step forward in his career with Renault.
“I think when a driver becomes a manufacturer driver it’s a step in a career, and it means you are now part of a massive organisation, not only in motorsport, but a car company," he added.
"Apart from that it’s a manufacturer that wants to become world champions. They want to do it in the medium- to short-term, and they’ve trusted me to help them to do that.
"The next step is the difficult one, and that’s why in 2018 I want to help them to take the next step. If it’s to consolidate as the fourth team or be the third team, I don’t know, this we haven’t talked about yet.
"I want to help them to score as many points as possible, and together with Nico [Hulkenberg] to take them to the next level.”