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Roger Federer survives massive scare at Australian Open to win final set tie -break from 8-4 down - Independent.ie
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Does Australian Open final have a fifth set tie-break or do players have to win by two clear games? - Sporting Excitement
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Australian Open: The super 'tie-break' saves Federer against Millman: "If not, I would have lost" - Sports Finding
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Australian Open announces switch to final-set tie-breaks for 2019 tournament | Australian Open | The Guardian
Australian Open's new tie-break rules receive lukewarm praise from Roger Federer, Angelique Kerber | Fox Sports
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