Sauber's former reserve driver Robin Frijns has tested a DTM machine at Spain's Monteblanco circuit earlier this week as Audi evaluated a number of young drivers.

Frijn's had looked set to rise to a full-time F1 seat after being touted by Sauber following his 2012 World Series by Renault championship success, but was surprisingly let go by the Swiss outfit earlier this summer despite only having driven once for the team.

The Dutchman took part in the test along with seven other young hopefuls, including the two Briton's of Jordan King and Harry Ticknell, under the watchful eyes of former double DTM-champion Timo Schieder and Audi's new rising star Adrien Tambay.

Audi's head of DTM Dieter Gass stressed the importance of conducting young driver tests, such as the one carried out at Monteblanco, as a valuable investment for the Ingolstadt manufacturer's future talent.

"We regard this talent scouting event as an investment in the future," said Gass.

"We're absolutely happy with our current driver line-up but would still like to give young talents an opportunity to take a peek behind the scenes of the DTM from time to time.

"This is how some of our current drivers got started as well and today they're part of the DTM or other series."