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Novak Djokovic (AFP)
Novak Djokovic rolled into the Shanghai Masters quarter-finals as the world number one made light work of American John Isner on Thursday.
The defending champion from Serbia dismissed the 16th seed 7-5, 6-3 in 74 minutes and plays upcoming Greek Stefanos Tsitsipas or Poland's Hubert Hurkacz in the last eight.
Roger Federer, the 20-time Grand Slam champion, faces 13th seed David Goffin of Belgium later Thursday.
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