Garcia will be expected to get results but with a squad that looks much weaker than last season that looks difficult; what the former Watford boss desperately needs is a positive start in Sunday's derby at home to Levante.
The Natatorium is one of the 12 newly-built competition venues. 42 of the 53 venues are scheduled to be completed by the end of 2020.
The Yorkshire side's return to the top-flight after a 16-year absence got off to the worst start when defender Robin Koch was penalized for a handball and Mohamed Salah slotted home the resulting penalty kick.
Thiem was runner-up at the Australian Open earlier this year and also lost in the French Open finals in 2018 and 2019.
Chelsea have been big movers this summer to give Frank Lampard a squad to challenge for the title.
1. How will Valencia react after nightmare summer?
Bremen piled on the pressure and should have doubled their lead in the 52nd minute when Chong missed the target just wide.
"From the perspective of a 90-minute game, it is reasonable for Guoan to seal the victory. I still want to praise all the team members because they showed high morale on the pitch," said Teda head coach Wang Baoshan.
Most Chinese internationals are expected to participate in the tournament with all the games to be played behind closed doors.
The Serie A teams hope that the creation of the yet to be named media company will help boost revenue from broadcast rights, an area where Serie A earns less than rival leagues in England, Germany, and Spain.
Saturday ends with newly-promoted Cadiz, who on Wednesday drew their last friendly of the summer 1-1 with Almeria, at home to Osasuna.