Novak Djokovic beats John Isner in Shanghai Masters

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World number one Novak Djokovic made another display to ease American John Isner in the Shanghai Masters next round.
Serb Djokovic did not face a rest point as he won 7-5 6-3 from the 16th seed.
Last week, defending champion Djokovic, who won the Japan Open, hasnt dropped a set in seven matches since injury forced him.
He faces sixth seed Stefanos Tsitsipas or Pole Hubert Hurkacz .
I am really happy with the way I am playing. This is only one of the best serving matches Ive played, said Djokovic, who won 85 percent of his support points.
Before squeezing past qualifier Vasek Pospisil russian third seed Daniil Medvedev saved five set points.
Even the US Open runner-up, that won the St Petersburg Open last week, earned a 7-6 (9-7) 7-5 victory to extend his record two defeats in his past 24 matches.
Those losses came from Spanish world number two Rafael Nadal, who isnt currently playing Shanghai, in the US Open last month along with the Rogers Cup final in August.
Medvedev, 23 and 10th seed Fabio Fognini, will play with following the Italian beat seed Karen Khachanov 6-3 6-5.
Italian 11th seed Marco Berrettini developed with a 7-6 (7-5) 6-4 win over Spains Roberto Bautista Agut, boosting his chances to qualify for your season-ending ATP Finals in London next month.
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