Sebastian Vettel will get a new chassis for the Italian Grand Prix after team principal Christian Horner admitted his pace in the Belgian Grand Prix was "extremely unusual".

Having qualified in third place and jumped to second at the start, Vettel started to drop back through the field to finish fifth while team-mate Daniel Ricciardo went on to take victory. With the pace difference between the two drivers surprising to the team, Red Bull has confirmed will give Vettel chassis 04 in Monza in an attempt to rule out any chassis issues.

Horner said the main sign that Vettel's lack of pace was strange came in the form of increased tyre degradation compared to Ricciardo, with the reigning world champion three-stopping in the race.

"Sebastian has got the best feeling for these tyres as history has shown," Horner said. "We have to look in to [Spa] to understand; there's obviously something wrong that he wasn't able to have the same pace as Daniel and be harder on the tyre.

"Obviously we missed out on Friday on any running of any real benefit to Seb, and of course we need to check whether something has actually broken on the car.

"There's obviously a lot of things that have gone wrong for him. A spark plug failure [in Belgium] on Friday robbed him of a lot of time so then he has to take a lot of information from the other car. We know their styles are quite different. So of course we need to check whether something is actually broken on the car because that was extremely unusual what we saw."