Last year , Mercedes won all but three of the calendar 's races , finishing with at least one car on the podium at every single race . McLaren boss Ron Dennis questioned British team 's chances for 2015 Formula One season . Dennis expects start to new season to be ` ` problematic '' but ` ` competitiveness will be quickly established '' Drivers Fernando Alonso and Jenson Button want to focus on ` ` winning and not beating each other '' First test race of new season got underway in Melbourne on March 15 .
McLaren boss Ron Dennis questioned British team 's chances for 2015 Formula One season . Dennis expects start to new season to be ` ` problematic '' but ` ` competitiveness will be quickly established '' Drivers Fernando Alonso and Jenson Button want to focus on ` ` winning and not beating each other '' First test race of new season got underway in Melbourne on March 15 .