![Belgrade. 25th May, 2021. Serbia's Novak Djokovic serves to Germany's Mats Moraing during their ATP 250 Belgrade Open round of 16 singles tennis match in Belgrade, Serbia on May 25, 2021. Credit: Belgrade. 25th May, 2021. Serbia's Novak Djokovic serves to Germany's Mats Moraing during their ATP 250 Belgrade Open round of 16 singles tennis match in Belgrade, Serbia on May 25, 2021. Credit:](https://l450v.alamy.com/450v/2fx5n0h/belgrade-25th-may-2021-serbias-novak-djokovic-returns-to-germanys-mats-moraing-during-their-atp-250-belgrade-open-round-of-16-singles-tennis-match-in-belgrade-serbia-on-may-25-2021-credit-predrag-milosavljevicxinhuaalamy-live-news-2fx5n0h.jpg)
Belgrade. 25th May, 2021. Serbia's Novak Djokovic serves to Germany's Mats Moraing during their ATP 250 Belgrade Open round of 16 singles tennis match in Belgrade, Serbia on May 25, 2021. Credit:
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