Lewis Hamilton fired the opening salvo of the 2019 Formula One season, setting the pace ahead of team-mate Valtteri Bottas on a dominant opening day of practice for Mercedes at the Australian Grand Prix.

The Briton ended both of Friday's two 90-minute sessions at the top of the timesheets, with his fastest lap of one minute 22.600 seconds set in the afternoon, over a second quicker than his morning benchmark.