By Buchholz. But he isn't quite right. If Astralis win, these are gonna be their scores
G2 (8-7)
NiP (7-7)
fnatic (7-7)
FaZe (7-8)
HR (7-9)
MiBR (6-9)
So, by only this, it would be MiBR vs G2, HR vs NiP/fnatic and then NiP/fnatic vs FaZe. But G2 already played vs both HR and MiBR, so it would be G2 vs FaZe. About the other ones, MiBR opponent, then should be drawn from fnatic and NiP. The other one faces HR.
If Astralis loses, however, this is gonna be their scores
Astralis (10-5)
G2 (9-6)
NiP (7-7)
fnatic (7-7)
FaZe (7-8)
HR (7-9)
In this case, the match-ups are very clear, Astralis vs HR, G2 vs FaZe and NiP vs fnatic