Novak Djokovic will finish the year as World No. 1 for a record-extending eighth time after beating Holger Rune 7-6 (7/4), 6-7 (1/7), 6-3 in his opening match at the ATP Finals on Sunday. The 24-time Grand Slam champion needed just one win or a defeat for young rival Carlos Alcaraz in order to secure top spot in the ATP rankings for 2023 and prevailed in a three-hour Green Group clash with spirited debutant Rune. 

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