"I hope we will get some new arrivals. We've still got time to fix everything, and things are in progress," Mueller added.
Media reports speak of deep divisions between him and his players.
The 30-year-old title favorite Roglic, however, had to finished second, 59 seconds behind, after having worn the yellow jersey for 13 days, while Australia's Richie Porte, 35, took the third place on the podium.
"It's really a tough and close match," said spiker Zhang.
Reports speak of reservations among Bayern's leaders to re-sign the 28-year-old, who couldn't achieve a breakthrough between 2013 to 2016. Spanish reports spoke of Sevilla and Valencia as interested parties.
After a goalless first half, Chengdu's Lu Weiyang broke the deadlock with a powerful shot from outside the box in the 61st minute. Brazilian striker Leonardo extended the lead 10 minutes later.
The second half witnessed the prowess of Shanghai captain Hulk. The Brazilian striker hit the crossbar in the 55th minute with his iconic long distance shot and then converted a penalty in the 71st minute.
The sending off killed the game for Desna as Wolfsburg assumed control and possession but for all that the hosts lacked in producing promising opportunities.
As usual, S10 is composed of three stages, namely the Play-In Stage, the Group Stage, and the Knockout Stage (including Quarterfinals, Semifinals, and Finals).
Wagner is putting a brave face on everything and is optimistic about sparking a successful turnaround despite reports he has already lost his players' trust.
Non-Japanese athletes should have tests within 72 hours before departure for Japan in their own country or region and will be tested again upon their arrival in Japan, according to the measures released after a joint meeting by Tokyo 2020, the Japanese government and the Tokyo metropolitan government.