Koeman changed the style Barca used under Quique Setien, adapting a 4-2-3-1, with Antoine Griezmann leading the line, Frenkie de Jong and Sergio Busquets in the midfield holding roles and Messi, Philippe Coutinho and Ansu Fati in an attacking line of three.
Facing Shenzhen, Suning's Alex Teixeira smacked the winning penalty in the 28th minute after Li Ang was tripped by Morteza Pouraliganji.
The 12-time champion also improved his record at Roland Garros to 95-2 with this win.
The 2020 China Sports Show was also affected. The annual sports business show had originally been scheduled in May, but had to be postponed to September. For the same reason, the number of international participants was much smaller than last year.
"The club has, and will continue to, follow all protocols relating to Covid-19 and Thiago will remain in self-isolation for the required period of time," informed the club.
"I think it's a great variety shot, the dropshot. I think it's important tactically to have it and to use it at the right time so that you can keep your opponent always guessing what the next shot is," said the top seed, who is seeking his 18th Grand Slam title at Paris.
With the score tied at 68-all before the final quarter, Sichuan took charge of the last 10 minutes despite Shao's departure.
Manuel Neuer tried to play down the unrest by saying: "We know what we are facing this season. We shouldn't speak about our tiredness but accept it."
As required by the government, the maximum limit of attendees per day at this year's French Open has shrunk to only 1,000 in response to the resurgence of the COVID-19 pandemic in and around Paris. Enditem
Rangnick has successfully worked in Gelsenkirchen twice in 2004 and 2011, and since then enjoys high respect among the club's supporters.
The shortlist for the Best Player award was selected by a jury comprising the 80 coaches of the teams that took part in the group stages of the 2019/20 UEFA Champions League and UEFA Europa League, along with 55 journalists selected by the European Sports Media group, one from each of UEFA's member associations.