Group D)
DRX goes underdog mode in this tournament. They will lose against LOUD and then will qualify for playoffs through lower bracket.
Group C)
BLG wins against NRG but get eliminated when it comes to their rematch in lower bracket.
Group B)
T1 goes on a hot run and wins against EG in upper bracket, making them qualify for playoffs. EG proceeds to win against FUT in a dominant fashion.
Group A)
No upsets here. Which is surprising, considering that the group is stacked.
P.S: I just realized that I started from group D and that all the upsets are from the Pacific teams. (I swear I'm not biased...)
Also let me know if some of these aren't considered upsets :)