In the 69th minute, the Shenzhen side got another goal-scoring opportunity. However, Harold Preciado's close-range shot was saved by Shenhua goalkeeper Zeng Cheng and then John Mary's follow-up header hit the woodwork once again.
Another interesting returnee is Martin Odegaard, who is back at the club after an excellent loan spell with Real Sociedad, and it will be interesting to see if the youngster finally gets the chance to impress in an attacking midfield role where there is much competition.
World number one Djokovic was stunningly disqualified after accidently hitting a line judge with a ball during his round of 16 clash with Pablo Carreno Busta of Spain.
Elsewhere, Belgium's Elise Mertens upset second seed Sofia Kenin of the United States 6-3, 6-3 to also make the last eight.
The boycott triggered by bonus payments saw the Union clamp down hard on the dissenting players and coaches which led to the dismissal of Simiyu, a former national captain of the sevens and 15s formats of the game.
"It's good that I managed to win in three sets and with a day off and just a three-setter to play, I'm feeling good," said last year's runner-up Medvedev.
"There's going to be a new Grand Slam champion. That's all I know right now. There's no past Grand Slam champions left in the draw," Zverev said.
The home team had a great chance to even things up in the 30th minute when Eli Dasa's ball found an unmarked Eran Zahavi whose shot went wide of goal.
In Paris, France came from behind to repeat their triumph in the final of the 2018 World Cup, beating Croatia 4-2, despite the absence of striker Kylian Mbappe.
In other matches on Friday, Tijuana secured a 2-1 home win over Monterrey and Santos Laguna drew 1-1 at Juarez. Enditem
YINCHUAN, Sep. 6 (Xinhua) -- "Cycling 600 kilometers in 6 days! A wonderful trip to Qinghai Lake!" On 75-year-old Gu Dawo's WeChat Moments, this latest post has earned more than 100 likes. "It's not only an experience but also a challenge for me to complete the riding tour," Gu said of his first long ride on highlands over 3,000 meters above sea level.