The world event is taking place at the Carioca 1 Arena in Rio de Janeiro, Brazil from February 15-17 and Spurs lost 58-90 to host Flamengo late on Friday.
Last season’s NBA Gatorade League Champions were rocked early by the Brazilian featuring NBA Champions Anderson Varejao and never recovered.
Spurs Forward Josh Huestis was the only player to score in double figures (10) for the American team with Brimah scoring eight points.
Amida added seven rebounds, four blocks and two assists in 25 minutes of action for Spurs whose disappointing season continues after winning the G League title last season. Flamengo was led by Argentine Franco Balbi who scored 19 points.
Austin takes on San Lorenzo who lost 64-86 to Basketball Champions League winners AEK Athens in the other semifinal for third place.
Flamengo and AEK Athens will compete for the gold medal on Sunday February 17.
By Yaw Adjei-Mintah
@YawMintYM on Twitter