Sebastian Vettel says Red Bull has a good base to work from after he enjoyed a trouble-free Friday ahead of the Italian Grand Prix.

Having been hit by reliability issues during practice for the Belgian Grand Prix which hampered his race preparations, Vettel had a much more productive Friday at Monza and ended FP2 seventh fastest. After finishing the second session half a second slower than Nico Rosberg, Vettel said being able to do more running has given him confidence for the rest of the weekend.

"Today was a good day in terms of laps we could do and stuff that we could test," Vettel said. "It's always important to get the Friday right to build on to for the rest of the weekend. I felt a bit happier than previously."

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However, Vettel said the cars were noticeable trickier to drive at Monza this year than in previous seasons.

"It was very slippery, this year's cars are down on grip so it's normal, plus the fact that you have minimal downforce at Monza making things quite interesting."

With Pirelli supplying the medium and hard compound tyres, Vettel believes the lack of grip from each should improve as the weekend goes on.

"It's the hardest choice that you can go for. I think it should be one stop on Sunday but we'll have to wait and see. I think some people struggled to get them to work. Also, the difference between the medium and the hard was expected to be larger than it was in reality which is another indication that they don't really start to work yet.

"I think tomorrow and Sunday should be a bit better though because it gets a bit warmer and the track gets rubbered in so it should come to us."