There was some debate in earlier threads about what level Egor Demin was playing at when he played for Real Madrid. Some said it was a step or two below NCAA basketball.

According to this box score Demin was on the team that beat the Dallas Mavericks in a preseason game last year: https://www.espn.com/nba/boxscore/_/gameId/401608099

Granted, Demin did not play in the game, but I think it could be argued that he played with and against some pretty solid competition in Spain.