Sebastian Vettel insisted it was difficult to get the perfect lap despite securing pole for the European Grand Prix in Valencia.

The defending champion continued his strong qualifying form this season by taking top spot for the seventh time in eight races having earlier led the way in the final free practice session of the weekend.

Vettel's run to pole came despite the change in regulations ahead of the weekend which ensured that teams were unable to alter their engine maps between qualifying and the race - something which was expected to hurt Red Bull in particular.

However, Vettel and team-mate Mark Webber were once again the class of the field to secure the top two spots on the grid although the German said it hadn't been as easy as it may have appeared.

"There was a lot of talk going into this GP about the regulation changes and there will be a lot of talk before the next one," he said. "I think everyone will lose out on something, but people expect us to lose more than other teams and that is where I disagree. Overall it was a very good day for us - it's good to have the front row for our team, but it will be a long race tomorrow.

"It's always tough here. It's a tricky circuit, as there are so many corners - I think there are 25 before we cross the line again, so to get all of them right is very difficult and to get the perfect lap is quite tough. I think my first lap was quite good, I was very happy and Mark was obviously with his second run. So, it's a good result and a good place to start from tomorrow, we'll see what we can do."