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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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Katie Boulter reaches second round of Australian Open - despite being unaware of tie-break rule change
Australian Open 2019, tie-break rules, super tie-break at 6-6, big change to final sets, longest Australian Open match ever | Fox Sports
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Australian Open 2019: heat and tie-break rule changes – explained | Australian Open 2019 | The Guardian
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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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