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Australian Open 2019: heat and tie-break rule changes – explained | Australian Open 2019 | The Guardian
Australian Open Tennis: Organisers will introduce 'super tiebreakers', with a 10-point tie break at six games all.
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Roger Federer survives massive scare at Australian Open to win final set tie-break from 8-4 down - Independent.ie
Australian Open Tennis: Organisers will introduce 'super tiebreakers', with a 10-point tie break at six games all.
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Katie Boulter reaches second round of Australian Open - despite being unaware of tie-break rule change
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Australian Open announces switch to final-set tie-breaks for 2019 tournament | Australian Open | The Guardian
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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