Yesterday Finland unexpected had very hard time against Sweden. They only won in last seconds after some questionable calls from refs.
In main game of day Greece wins against Italy, they were leading almost whole game, keeping relatively safe 5-10 points lead.
Poland wins against Slovenia. Not sure that we can call it as surprise. Doncic can't win games alone. Didn't checked odds before the game who were favorites.
From what I saw until now, referees' calls are not so controversial. I didn't watch the match between Finland and Sweden, but from the scoreline, it looks like a hard game.
Greece did the job mostly with its defensive line, great and massive. As for the odds for the match between Slovenia and Poland, Slovenia was the favorite with nearly the same odds as Greece. I'm guessing that this was a mistake from the bookmakers, based on Doncic's appearance.