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STAT PACK: The amazing numbers behind latest Djokovic ATP record - TennisBuzz - Breaking tennis news, live scores and features
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ATP Tour records: Most titles in tennis career (men's) | SportzPoint
Djokovic Presented Year-End ATP World Tour No. 1 Trophy At Nitto ATP Finals - Tennis TourTalk
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2017 ATP World Tour - Wikipedia
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List of ATP number 1 ranked singles tennis players - Wikipedia
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