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Halle, Germany. 21st June, 2018. 21.06.2018, Nordrhein-Westfalen, Halle: Tennis, ATP-Tour, Doppel, Herren, Viertelfinale. Alexander Zverev from Germany in action against Puetz and Struff from Germany. Credit: Friso Gentsch/dpa/Alamy Live News Credit: dpa
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