Current world champion Sebastian Vettel has unleashed his anger at Mercedes and Pirelli over the alleged 'testgate' scandal that continues to dominate the sport's headlines.

Mercedes has been taken to the International Tribunal court by the FIA over the once secret test conducted between Mercedes and Pirelli between the Spanish and Monaco GP's.

Speaking in Montreal, it appears Vettel and Red Bull's anger over the test still seems uncontrolled.

"I see it as a critical issue," he told Suddeutsche Zeitung newspaper.

"Each test kilometre is an advantage, and Mercedes had the opportunity to test tyres that we will probably race at Silverstone.

"I think this is an advantage over all the other teams," added the triple world champion.

Indeed Vettel also launched an attack at Pirelli over the new tyres that were due to be raced in Montreal but will now only be tested on Friday (where rain is forecast) and only taken to Silverstone if there unanimous agreement from all the teams.

"The tread completely falls off," said the 25-year-old. "This is a safety risk for all of us.

"That we won't have these (revised) tyres for the race on a fast track like Canada, for me is inexplicable," added Vettel.

"[Delamination] didn't happen to us, but it happened to other people on different circuits," he said. 

"Barcelona is very different than Bahrain, for example. I think it's difficult to know if this circuit makes it any harder.

"We obviously hope there won't be any problems with delamination for this race, and if decide to use the new tyres for the next race hopefully this argument about delamination will be out of this world."

Despite Vettel's frustration, his German rival at Mercedes, Nico Rosberg, is dismissing any claim Mercedes gained anything from the test saying Pirelli were in charge of all operations while he and team-mate Lewis Hamilton simply drove the car.

"We have no say whatsoever -- they (Pirelli) say 'you are doing that, that, that and that' and the engineers that they have run our programme," he told Sky Sports.

"So it is not for us to learn anything or to decide on anything that we do."

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