A sublime backhand pass followed by a forehand victor sealed a break to love for Zverev in the fifth game of the second set, and he duly wrapped up victory with minimal fuss.
Reigning champion Roger Federer was pushed all the way for the second match in a row before beating Roberto Bautista Agut to squeeze into the Shanghai Masters quarter-finals yesterday.
The Swiss 20-time Grand Slam champion, who will be replaced by Djokovic as world number two on Monday, lost 6-4 6-4 to Coric.
Djokovic and Zverev met on clay in the final of the Rome Masters in May last year, the 21-year-old German winning 6-4, 6-3.
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Last month, the singer spoke to her 144 million followers about her anxiety and depression in an Instagram LIVE chat session. After leaving a medical centre, she reportedly had an emotional meltdown and was readmitted to the mental health facility .
Coric, the 13th seed, upset Roger Federer in Saturday's semi-finals to reach his first Masters 1000 final.
Coric, who defeated Federer in three sets at the Halle Open final in June, earned a break in the opening game of both sets on Sunday to wrap up the victory with an excellent forehand pass after 73 minutes.
In the second set, Nisshikori recovered to fight from 1-3 behind force a tie-breaker, but the net cord gave favour to the 20-time Grand Slam victor in the decisive moment. Djokovic, chasing his 72nd career ATP title, will play either top seed Federer or Croatian Borna Coric in the final.
Federer's wife Mirka and their four children were in the arena and he said afterwards: "I'm not sure if they give me more courage fighting on court, but they were here today". Nishikori broke back but Federer served out the set to love.
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Mr Rosen said of the 29 million users hit, 15 million had their names and contact details gathered. Facebook says third-party apps and Facebook apps like WhatsApp and Instagram are unaffected.
Speaking in Shanghai, the 31-year-old Djokovic said there was "confusion" with the two competing events coming so close together and being so similar. He's bidding to win a record fourth Shanghai title this week.
He is backing instead of the rival ATP World Team Cup, set to take place weeks later at the start of the 2020 season in Australia.
A win on Sunday would deliver a fourth title for the season to Djokovic, beside Wimbledon and the US Open.
Three dead, International Monetary Fund summit shaken as strong quake hits Indonesia
A string of earthquakes in Lombok in eastern Indonesia killed more than 550 people over the summer. Approximately 80,000 displaced persons shelter in makeshift shelters near their destroyed homes.
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