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ATP Finals: When and where to watch Roger Federer vs Stefanos Tsitsipas semi-final live - Sports News
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Tennis | Nitto ATP Finals 2019 | Tsitsipas stuns Federer in straight sets to book final berth on London | Britwatch Sports
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Stefanos Tsitsipas celebrates his victory after the Men's Singles semi-final match against Roger Federer on day seven of the Nitto ATP Finals at The O2 Arena, London Stock Photo - Alamy
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