"We gave up our own advantage in tactics, only to let Jiangsu play its way comfortably," said Shanghai head coach Wang Zhiteng.
"I hope we will get some new arrivals. We've still got time to fix everything, and things are in progress," Mueller added.
In the day's other match, South Korean striker Son Heung Min scored four goals as Tottenham produced a second half blitz to win 5-2 away to Southampton.
Betis are another team with two wins from two games after Nabil Fekir's penalty after 10 minutes and William Caravalho's powerful drive from outside the area eight minutes later gave the team from Seville a comfortable 2-0 victory against Valladolid and maintain new coach Manuel Pellegrini's perfect start.
"You deserved a farewell befitting who you are: one of the most important players in the history of the club, achieving great things for the team and on an individual level," commented Messi on social media.
The visitors from the Ukraine grew in confidence but the dismissal of Joonas Tamm, who saw his second yellow card for repeated foul play at the hour mark, changed proceedings on the pitch.
Right back Nelson Semedo is on the verge of agreeing a move to Premier League outfit, the Wolves. Enditem
Andre Silva (3rd L) of Frankfurt takes a scoring penalty kick during a German Bundesliga match between Hertha BSC and Eintracht Frankfurt in Berlin, capital of Germany, Sept. 25, 2020. (Photo by Kevin Voigt/Xinhua)
Muto said that they have not reached any conclusion on any of the countermeasures and will "continue the discussion." Enditem
Reports also speak of Sergino Dest as Bayern's target to gain a backup up for the right-back position. The Ajax defender is said to be on Barcelona's list as well. Enditem
Other measures include the reduction of stakeholder personnel attending the Games by 10 to 15 percent, streamlining transport services, adjusting spectator activities at competition venues and hosting a number of pre-Games meetings online.