"The AFC Executive Committee recognized that the pandemic has affected the ability of the AFC to deliver its competitions," the Asian football governing body said in a statement.
"I was super close to being a grand slam champion. I was a few games away, maybe a few points away. For me what upset me the most is not the third set or something like that, it's the fifth set. I had a lot of chances in the fifth set and didn't use them," said a disappointed Zverev, who was contesting his first career major final.
Having to accept the circumstances, Flick is forced to start into the season with an incomplete squad.
Hunan now ranks third in the standings behind Qingdao and Ruichang Biyuan. First-placed Qingdao breezed past Xiamen 4-1 on Thursday, while Ruichang overcame Anhui Souyu 3-2.
"I know that all the athletes and entire athletics community were looking forward to this event but I ask them to keep heart," he noted.
Marcelo Bielsa's Leeds United will be fascinating to watch after the master tactician earned promotion last season, although Leeds could suffer from a lack of goals.
The other game on Tuesday saw powerhouse Guangzhou defeat Shenzhen 2-0 thanks to aggressiveness by Brazilian midfielder Jose Paulo Bezzera Maciel Junior who opened the scoring in the 27th minute and contributed an accurate pass to seal the win in the 53rd minute. Enditem
Braunschweig's strategy did not pan out as Berlin levelled the scores in the 65th minute through Peter Pekarik, who benefitted from Cunha's cut-back pass from inside the box.
The 24-year-old player has penned a one-year contract with the Qatari second division team for an undisclosed fee.
In the other match of the day, Shenzhen Nankeda crushed Jiangsu Weikeduo 5-0 to sit fifth. Enditem
New Arsenal signing Willian chipped in with two assists as Gabriel, another Brazilian debutant, netted the second with a header shortly after the break before Arsenal captain Pierre-Emerick Aubameyang rounded off an easy win before the hour.