Here are some of my thoughts and predictions for SEN vs TH.
Map Picks:
TH and SEN have a pretty similar map pool and I think this will be the closest game of the tournament. TH has been permabanning Ascent so I believe that will be their ban, and SEN will ban Bind. For some reason, SEN's icebox is really good during internationals and garbage anytime else. While their Bind is pretty average, I think its a super procedure/set play-heavy map for which they might not be prepared for in time.
I think TH is a rookie team that likes to gamble, and they have yet to see SEN's Abyss. I think they will take that risk and choose Abyss first. SEN will pick Lotus. TH will ban Haven afterwards and SEN will ban Icebox. Remaining map is Sunset. Both of these teams are at the top in terms of win percentage on Sunset, with SEN taking a slight edge at 75% Win Rate, compared to THs 71%.
I think Abyss is a complete toss up and anyone trying to predict would be braindead. We haven't seen any Abyss for SEN so we really don't know what to expect. But seeing as how prepared they were with Neon, I would bet money that the coaching staff and JohnQT have some good things cooked up. If I were to guess what comp they'd be playing, I'd say:
Sacy: Sova
Tenz: Gekko
Zellsis: Viper
Zekken: Raze,Jett,Neon (i could see him on any of these)
JohnQT: Cypher
SEN is comfortable with all of these agents, with the weakest link potentially being Tenz Gekko.
For map 2 Lotus, I think that SEN have a slight edge. They've looked really really strong on Lotus except for their map against EDG. I'm not really sure what happened in that game but the calling was very mid. There was no map presence whatsoever and JohnQT looked like he was hesitating a lot. Both teams are really good at retakes but the reason why I think SEN has the edge is because they're just getting off a win against an EMEA team. While I think TH is better than FNC, their playstyle is somewhat similar. TH has not played against an NA team since the lower finals of Shanghai. That's one edge. The other is that with Neon in SEN's map pool, it adds another layer of depth. It'll be hard to predict whether Zekken will be on Neon or Raze and SENs team comps changes pretty drastically based on that.
For map 3, I think in my opinion, SEN will either win 2-0 or lose 2-1. While both of these teams are fantastic on Sunset, SEN have looked shaky at times against different opponents. I think they've gotten away with it for the most part with EDG starting slow, Hiro and Boaster having off games on Sunset, and DRX looking somewhat nervous. TH has real shooters. Every person on that team has the ability to frag out unlike the ones I listed. I think if it gets to a map 3, it'd be difficult to get past BenjyFishy or Riens. SEN excels on their attack side, as does TH. But TH's defense is way better than SENs.
So to conclude, I think SEN either wins 2-0 or loses 2-1. Thank you for reading if you did.