Reigning DTM champion Marco Wittmann has vented his anger over Audi's race two tactics at the Red Bull Ring after finishing behind championship leader Mattias Ekstrom in sixth.

The Team RMG driver started the race in third position but fell to sixth after becoming embroiled in a race-long battle with the leading Audi contingent.

Whilst a podium finish was always looking to be a tall order for the leading BMW M4 driver, Witmann found himself mired behind the then third placed Audi of Nico Muller as the race entered its final phase, with Mike Rockenfeller and Mattias Ekstrom lurking not far behind.

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A late safety car period also bunched the field back up, which resulted in Wittmann finding himself boxed out on the restart and falling back down the order behind the Audis of Rockenfeller and Ekstrom, along with the Mercedes of Gary Paffett.

"I am disappointed and angry. Following the changes to the weight situation, Audi now clearly has the car with the best race pace in the field," said Wittmann.

"If you still feel it necessary to block the opposition, then that is not on. 

"I am the kind of racing driver who wants to see hard but fair racing. Unfortunately, that was not the case today.”

Indeed, BMW Motorsport director Jens Marquardt also felt his driver was 'blocked several times' on his way to a sixth place finish.

"Sunday’s race was also hard work for us. Marco Wittmann was blocked several times, and ruined his tyres in the process which meant he had to settle for sixth place in the end," said Marquardt.

"Despite this, a big compliment has to go to Marco, who kept his nerve and came away with eight points."