I believe this is a very fun matchup and will be highly entertaining to watch. Of the four opening matches, this series pits two high echelon Chinese teams against one another and I can see FPX having the advantage against RNG. This belief of mine mainly stems from the fact that first of all, FPX is much more solid as a team and relies much less on individual skill than RNG does. Secondly, FPX is simply more experienced, with all members of their roster having played internationally and Autumn too, who was imo one of Oceania's most promising players. But don't get me wrong: RNG has great players too, such as SWERL, Xiaonuo and Minimise.
Although both sides are strong, I think that FPX's mentality gives them a substantial boost and I hope RNG is able to cope on the second map if they lose the first.
2-1 FPX win (given that RNG copes with first map loss, if not 2-0 FPX win).