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Stefanos Tsitsipas stuns Roger Federer in four-set Australian Open thriller | Australian Open 2019 | The Guardian
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Stefanos Tsitsipas beats Roger Federer: Australian Open 2019 – as it happened | Australian Open 2019 | The Guardian
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Melbourne, Australia. 20th Jan, 2019. Roger Federer of Switzerland (L) walks past Stefanos Tsitsipas of Greece after the men's singles 4th round match at the Australian Open in Melbourne, Australia, Jan. 20,
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Australian Open 2019: Stefanos Tsitsipas builds on Youtube lessons to beat Roger Federer - BBC Sport
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