F1 Australian GP: Lewis Hamilton upbeat after 'difficult day'
Mercedes driver Lewis Hamilton says it was a "difficult day" after Friday's practice sessions for the Australian Grand Prix, but he feels "positive" about a strong race.
The Brit had missed the first session after his car stopped on track with an oil sensor calibration problem, but he made amends in practice two by finishing fastest ahead of team-mate Nico Rosberg.
Hamilton says his improved performance in the afternoon is a "nice foundation" to build on ahead of the opening race on Sunday, and hopes his breakdown in practice one is "just a one-off".
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