Mercedes still not sure where Melbourne pace has come from

MELBOURNE, Australia -- After smashing the Albert Park lap record by 0.6s and beating Ferrari by 0.7s, it was not immediately clear to Mercedes how it had managed to gain such a massive advantage on the eve of the first race of the season.

Lewis Hamilton and Mercedes' surprising and ominous pace in qualifying shatters the preseason notion that Ferrari was the team to beat coming into 2019. A round-up of the main talking points from the Australian Grand Prix.

The team knew it had made progress in the final days of pre-season testing in Barcelona, offering a promising base to build on in the two weeks leading up to Australia, but it didn't expect to be this fast. There was no indication that…