Felipe Nasr says it is 'hardly possible' to predict where Sauber will feature in the 2016 Formula 1 pecking order, but is pleased with the level of improvements made to his car over the winter.

The Brazilian enters his second season of F1 racing with the Swiss team looking to build on a positive maiden campaign, headlined by a surprise fifth place finish on his race debut in Australia, en route to 13th overall.

However, having aired his frustration at the lack of development over the course of the 2015 season, Nasr is hopeful the 'innovations' introduced by new technical director Mark Smith will spur him on to a more consistent mid-field challenge.

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"It's difficult for me to predict how the positions behind the top teams are going to pan out this season - and where we'll be able to line up in that part of the field. We're going to put innovations on the grid, but so are our competitors, and their efficiency remains to be seen.

"It's hardly possible to make any predictions under these circumstances. The whole team has been working very hard to explore areas in the car that we can improve. That's why I'm confident that we've made progress. The season will show what positions we'll be able to achieve with it."