Gomez came off the bench in the 87th minute and struck six minutes later by controlling Francisco Sierralta's headed clearance with his chest and rifling a 20-yard shot into the bottom-left corner.
Xinjiang's Han Xu finished with a team-high 19 points. Liu Tongyi and Wang Lili each had 17.
The 28-year-old, who endured a difficult 18 months at Barcelona before being farmed out to the Bundesliga club in July 2019, has rediscovered his confidence since returning to the Camp Nou last month, shining in a central attacking midfield role behind Lionel Messi.
Teenager Talles Magno, a key member of the Brazil team that won last year's under-17 World Cup, put Vasco ahead in the ninth minute at their Sao Januario stadium with an easy tap-in following Cayo Tenorio's cross.
The number of critics calling for a change on the German bench is increasing.
"It was a tough match. We didn't play at our level in the first quarter, but changed our tactics into zone defense from the second quarter," Shanxi coach Li Ge commented.
Schweinsteiger is warning that the road to the 2021 Euro isn't on the right track after all the experimenting in the 20 games when 40 players have been tested.
Ahead of the start of the first round, player Stuart Carrington and referee Andrew Barklam tested positive for COVID-19.
"We don't know for sure what will happen in the next few months," Coe said, braving the rain on the track. "We are absolutely committed to working with the organizing committee for the delivery of a fantastic games, though there have to be some adaptions.
"What you are doing in this court is unbelievable. Not just this court - throughout your entire career, you've been a great champion," Djokovic told Nadal during the trophy presentation on the Court Philippe Chatrier. "Today you showed why you are King of the Clay."
In another game on Monday, Shanghai pulled off an overwhelming victory over Dongguan 68-54.