US Open Tennis Championships - Hanging tough. 🇧🇬 Tsvetana Pironkova steals the first set 6-4 over Serena Williams. | Facebook
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US Open 2020: Serena, Azarenka and Pironkova - the trailblazing women making motherhood normal - Eurosport
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PREDICTION, PREVIEW. Serena Williams, Pironkova, Azarenka and Mertens to play on Wednesday - Tennis Tonic - News, Predictions, H2H, Live Scores, stats
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Serena Williams edges out Tsvetana Pironkova to reach US Open semi-finals against Victoria Azarenka | Tennis News | Sky Sports
US Open Tennis on Twitter: "Down but NEVER out. @serenawilliams rallies to win the second and third sets in convincing fashion over Pironkova. #USOpen https://t.co/iIds0LVrn0" / Twitter
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Serena Williams digs deep against Pironkova to reach US Open semi-finals | US Open Tennis 2020 | The Guardian
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