Ferrari's 2019 Formula 1 car has been pitched "in the wrong place aerodynamically" and it will take "a lot of work" to fix that, says 2016 world champion Nico Rosberg.

The Italian team has taken a different aerodynamic approach to Mercedes, adopting a lower-drag philosophy compared to its rival in addition to divergence over front-wing concepts following the new-for-2019 aero rules.