Djokovic advances, Rublev saves 5 match points in Dubai win

Top-ranked Novak Djokovic eased into the quarterfinals at the Dubai Championships by beating Tallon Griekspoor 6-2, 6-3 on Wednesday. Djokovic extended his winning streak to 19 matches in tidy fashion a day after being pushed to a third-set tiebreaker by 130th-ranked Tomas Machac. It was Djokovic's second match since winning his 10th Australian Open title.

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