Sauber has become the fourth team to reveal their 2018 car, the C37, featuring an all-new livery as part of their new partnership with Alfa Romeo.

The Swiss team endured a difficult season last year, slipping to the bottom of the constructors' championship and scoring just five points but, with the Hinwil operation gathering speed after recent problems and the latest Ferrari engine, expectations are high for a much improved year ahead.

Gallery:  Alfa Romeo Sauber C37

Alfa's return to Formula 1 for the first time in 33 years as title sponsor and technical partner is part of the enhanced relationship with Ferrari, with both brands coming under the Fiat umbrella, as is the arrival of F2 champion Charles Leclerc alongside Marcus Ericsson.

Team principal Fred Vasseur suggested last year that very little of last year's design would be carried over to 2018 and certainly, the C37 does look a step forward from last year, although compared to the other cars seen so far, the Sauber is the most basic.