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Tiger Woods charged into the lead at the Australian Open with a five-under 67 in the second round.
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Woods got off to a quick start with a birdie at the 10th hole, his first of the day.
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He followed that with birdies at 13, 14 and 16.
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Yet another birdie at 18 gave him five birdies through his first nine holes and sole possession of the lead at nine under.
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Woods had two bogeys and three birdies on his second nine.
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Australian Jason Day challenged Woods for the lead with a fine round of his own.
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Nick Watney eagled the 11th and held the lead at one point but eventually dropped down the leaderboard.