Alliance vs Liquid
I rated Alliance a B+ during the group stages, they had unpredictable and varied but good drafts, won all their games, had some amazing team fight execution and seems to be on the same page for the most part. They're 12-1 in the last 13 matches (in non-captains draft) against some of the best teams in the world and before that the only big slip ups the last months happened when they played on almost no sleep due to some kind of snowstorm that messed with flights to Belarus.
Liquid got a Slohog-rating of C+ for the group stage performance going 1-2 vs VP, 2-0 vs CoL and then winning their last match vs VP 2-0. I think they had one draft win and one draft loss vs VP in the first round, lost the somewhat even draft and then was a size too big for CoL (despite CoL being underrated) and ending the day with a 2-0 stomp over VP who at this point looked really tilted and or tired. When VP's Captain FNG instapicks stuff during the draft I think it's a fairly good sign they'll lose the game, last time I saw it was the last two games vs EG at the Summit 4.
Team Liquid has looked very shaky for a long time and while a lot of that was due to them not really giving a shit about smaller tournaments I really feel that their coordination has been off too and that just won't cut it against Alliance.
As for the match up I think A can just ban out Liquids Void + AOE-teamfight combos which they've been successful with or just come prepared for it. Given how the recent months have looked A is much better in the late game, has a better drafting phase and has better team fight coordination. They might give up one game if they decided to do their Jon Jones impression and just give Liquid whatever the crap they want and then try to outplay it while playing Liquid's game. A more likely scenario in my mind is however that they'll just run Liquid over in straight games and keep trucking until they run into OG or EG in he winner's bracket's final where they might have a bunch of issues.
MVP vs LGD
LGD is a better team then MVP, they're more proven, they have on of the all time best captains in rOtK and their players ranges from very solid veterans to on of the new superstars of Chinese dota in Maybe. However, it's been chinese new years which means that all the teams from China has ranged from "absolutely awful" to "much worse then I expected" in their performance this tournament due to spending time with their families and whatnot instead of practising computer games 35 hours per day. To be fair LGD did not look as awful as for example CDEC or Vici Gaming, but they do not look anything like in prime shape. I gave them a C for their group performance.
MVP on the other hand has looked like shit for the most part since the International last summer and they don't even have the same squad given that their captain had to do military service in South Korea. However, they destroyed their group going 4-0 with quick and dominant victories over Team Secret and Ehome and three of their five players are ranked in the top 10 on the Chinese MMR leaderboard (#1, #5 and #10). This squad is in shape, coordinated and has a clear idea about how to play at least the early game of this patch. A team like Alliance, EG or OG might be able to survive the early onslaught and take over the game later but I don't think LGD is the team to do it given their recent shape and I have to bet MVP here at 2.7. If this game was played today I'd say they would be the straight up favourites with some margin and despite LGD getting a few days to prepare I think there's a much better chance that MVP wins then the odds indicate. I'll probably ad to this bet if odds keeps solid or climbs.
VP vs VG
I love Vici Gaming but anyone who saw their group preformance and says that they're playing well is either on drugs, without any knowledge at all about Dota 2, or someone you really shouldn't buy a used care from. It's best of one which increases variance and just the pure talent on Vici Gaming keeps me away from going big on Virtus Pro at evens, but yea, if group stages is any indication VP should have this in the bag. Vici looked really god damn awful. I gave them a D+, the 2nd lowest rating I gave to any team while VP got a C+.