World champion teammate Button set fastest time of the eight pre - season testing sessions . Sauber 's Kamui Kobayashi was third quickest over a similar distance ahead of Force India 's Vitantonio Liuzzi and Nico Rosberg in a Mercedes after the German took over from Michael Schumacher . British driver sets timesheets at Monaco on Saturday for his new team McLaren . Teams head to Barcelona next week for final sessions before first race in Bahrain . Struggling new team are confident of competing after their new team boss .
World champion teammate Button set fastest time of the eight pre - season testing sessions . British driver sets timesheets at Monaco on Saturday for his new team McLaren . Teams head to Barcelona next week for final sessions before first race in Bahrain . Struggling new team are confident of competing after their new team boss .