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Australian Open - Changing of the guard? What Stefanos Tsitsipas' win over Roger Federer really means
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Stefanos Tsitsipas overcomes Roger Federer to reach final of ATP Finals | ATP World Tour Finals | The Guardian
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First Masters 1000 Title & Career-High World No. 3! | Stefanos Tsitsipas 2021 ATP Highlight Reel - YouTube
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Stefanos Tsitsipas' mother says it would have been "painful" had her son let Roger Federer retire undefeated against him
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