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Perez angered by Pirelli response
Sergio Perez has slated Pirelli for the tyre manufacturer's response in the wake of his blow-out in Sunday's Korean Grand Prix.
After locking up on his McLaren's brakes into turn one and causing a flat spot on his front-right tyre, the rubber then suffered a high-speed delamination on the long straight that followed.
For Perez, it was his third incident this year after he suffered tyre failures in final practice for the British Grand Prix and the race itself.
Pirelli motorsport director Paul Hembery claimed there was "nothing" his company could have done about the situation in Korea as Perez's tyres were at the end of their life.
At the time, Hembery added: "We've absolutely no fears going forward. The structure we use now is what we have used for the last two years and there hasn't been an issue.
"Of course, you will get racing incidents, but that's life."
Such comments, however, have infuriated Perez who said: "It was the first time a tyre exploded from a lock-up, and then we hear that this is normal. This is not normal at all.
"We have a lot of lock-ups. It's easy to lock up in a Formula car.
"But what is not normal is that we get used to seeing explosions of the tyres and the tread coming away from the tyres.
"It is absolutely not acceptable for the teams and the drivers. It is just not acceptable.
"The first issue is the safety. If you have a lock-up and your tyre then explodes, it is a big concern.
"Definitely these kinds of issues have to be addressed and we have to get on top of it.
"You have heard from all the drivers that we are concerned. Not about degradation and looking after the tyres, that's part of the game, but this has become a safety issue."
Ferrari's Fernando Alonso, who criticised Pirelli in Korea for tyres that he said would not last five kilometres, has also renewed his attack.
Hembery's response to Alonso last week was to urge the Spaniard to check out how Sebastian Vettel uses his tyres.
That comment led to a meeting between Hembery, Alonso and Ferrari team principal Stefano Domenicali in a bid to clear the air.
Ahead of this weekend's Japanese Grand Prix, however, Alonso has again urged Pirelli to get their act together for 2014 in light of what happened to Perez.
"Five days ago we had a tyre explosion again," said Alonso.
"Because of a lock-up? Okay, maybe because of a lock-up, but after 20 laps if you have one lock-up and you have a tyre explosion there is something not going in the right direction.
"This is a fact. This happened five days ago. It is not words. Again, everyone sees and it is what we don't want to see for next year. So we need to improve that quality."