Australian cricket captain Michael Clarke has scored his first test double century, and led his side to a dominant position on day two of the second test against India in Sydney.
Earlier in play on Wednesday, Ricky Ponting made 134 - his first test century in almost two years.
Australia ended day two leading India by 291 runs, racking up an impressive 482 for 4 in reply to India's first innings total of 191.
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