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Tennis - ATP Cup - Melbourne Park, Melbourne, Australia, February 5, 2021 Serbia's Novak Djokovic in action during his group stage doubles match with Nikola Cacic against Germany's Alexander Zverev and Jan-Lennard
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Melbourne, Australia. 20th Jan, 2020. Tennis: Grand Slam, Australian Open. Men, singles, 1st round, Djokovic (Serbia) - Struff (Germany). Jan-Lennard Struff is in action. Credit: Frank Molter/dpa/Alamy Live News Stock Photo -
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