Valtteri Bottas claims Mercedes has made improvements after Barcelona testing two weeks ago.
Lewis Hamilton, meanwhile, suggested the German team haven’t got any upgrades on the W10.
“After two weeks of testing, the amount of data you have to analyse, to try to learn and improve is a lot. So it’s been a very useful two weeks,” Bottas told Autosport.
“As a team, we have learned a lot about the package we had in testing, and how we can optimise it better for the first race. We have made improvements already, even though we haven’t driven a single lap since testing.”