Valtteri Bottas admits he has work to do to close the gap to Mercedes teammate Lewis Hamilton following Friday practice for the season-opening Australian Grand Prix.
The Finn, who replaced the retired reigning world champion Nico Rosberg at Mercedes ahead of the 2017 season, was second and third quickest in the first and second practice sessions, though he trailed his new teammate by over 0.5s on each occasion.
When asked to explain the substantial gap to Hamilton, Bottas replied: "It's only practice, but I feel I have work to do in the shorter runs -- for me that's what I have to focus on.