Per liquipedia:
2-way tie
- Head-to-head Match Score
3-way tie
- Head-to-head Match Series
- Teams with two matchup head-to-head advantage automatically receives first of the group. Tie-breakers for the remaining two teams are determined using the above head-to-head tiebreaker process.
- If no team has a two matchup head-to-head advantage (all Teams are 1-1 head-to-head), then proceed to next step of the 3-way tie-breaker process.
- Map differential
- Round differential
- Tiebreaker Bo1 match
So for group Alpha if 100T win vs KRU, SEN gets first seed.
If KRU wins, they get first seed. Sen is guaranteed 2nd seed if they win vs. 2G
For group Omega, if MIBR somehow lose today and against FUR and LEV beat NRG, then LEV, NRG, and MIBR are all 2-3, and I think it then goes to map diff cuz MIBR beat LEV, LEV beat NRG, and NRG beat MIBR (I don't think that's happening but kinda interesting)