Australia's top order continue to hammer India on the second day of fourth and final cricket test in Sydney. Australian Skipper Steve Smith made his fourth century of the series. Australia have an unassailable lead of 2-Nil. Earlier, starting on their overnight score of 348 for two, Australia reached 420 for four at lunch. Indian bowlers proved ineffective, they were also not ably supported by fielding as a lot of catches were dropped early on in the game.