Retired reigning world champion Nico Rosberg was at the Barcelona test on Wednesday .
World champion said that despite world champion 's 's continuing links to Mercedes world champion Nico Rosberg would n't mind if Ferrari 's apparent form rang true in Melbourne and beyond .
Retired reigning world champion Nico Rosberg was at the Barcelona test on Wednesday , and he said that despite his continuing links to Mercedes , he would n't mind if Ferrari 's apparent form rang true in Melbourne and beyond .