Novak Djokovic has sealed the year-end men's world No 1 ranking for the sixth time to go level with childhood hero Pete Sampras after closest rival Rafael Nadal opted against playing in the ATP Tour event in Sofia next week.
Novak Djokovic has sealed the year-end men's world No 1 ranking for the sixth time to go level with childhood hero Pete Sampras after closest rival Rafael Nadal opted against playing in the ATP Tour event in Sofia next week.
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