Michael Roll made the two-pointer, with 0.2 seconds to go, and gave Tunisia the 76-78 victory over Japan in Saitama.
Japan came back from a double-digit deficit multiple times in the game (9-22, 40-51, 44-56) and tied the match with six seconds to go (76-76).
But, the guard of Olimpia Milano took over and made the two-pointer to hand his team the win.
Roll finished the game with 19 points, while Salah Mejri added 20. On the other hand, Yuta Watanabe had 17 points for the losing squad, which played without its best player, Rui Hachimura.