May 20 (GMM) As F1 celebrates the end of processional and predictable races, Pirelli has acknowledged that Turkey two weeks ago was one step too far.

The sport's new official tyre partner is supplying a more durable hard compound to teams in Spain this weekend, after drivers had to make four pitstops on average at Istanbul Park.

Some commentators have applauded the spectacle of the new formula, whilst acknowledging that Turkey - as a motor race - was nearly impossible for spectators to follow.

"We have gone from one extreme to the other," Red Bull team boss Christian Horner told O Estado de S.Paulo newspaper.

Agreed Pirelli's Paul Hembery: "We were caught by surprise in Turkey. Four pitstops is a lot. We are working on two or three."

Even if the right balance is found, not everyone is a fan of today's F1.

"I miss not being able to squeeze everything out of the car without having to look after the tyres," admitted Mark Webber.

Mercedes boss Ross Brawn, however, said it is here to stay.

"Most teams are already working on their cars for next season based on what (regulations) we have today," he revealed.

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