Scuderia Toro Rosso says 20-year-old Spanish driver Carlos Sainz Jr. will pair with Max Verstappen for the Formula One team in 2015.

Sainz, the son of former two-time world rally champion Carlos Sainz, became the youngest winner of the World Series by Renault 3.5 Championship this year.

Team principal Franz Tost says "we continue the tradition of providing youngsters from the Red Bull junior driver program with their first steps in Formula 1."

Sainz Jr. tested with Toro Rosso last year.

Tost says "he really surprised me and his engineers that day, with his mature approach and his speed."

Jean-Eric Vergne and Daniil Kvyat drove for Toro Rosso this season.