Power Rankings: Best, worst cases for all 30 teams — and where each could stumble

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By Michael Morrow
BBC Sport NI at Fukuoka
Robbie Henshaw will perform was called at centre for the final pool game from Samoa of Ireland.
Will partner Bundee Aki in midfield.
As Conor Murray comes in at nine, johnny Sexton is selected at fly-half with Joey Carbery around the seat.
Tadhg Beirne goes to the back row where hell join CJ Stander and Josh van der Flier from lock.
Jordan Larmour comes in at full-back having amazed in the first revival against Scotland of Ireland.
Needing a bonus-point to ensure passage to the last eight, head trainer Joe Schmidt had appointed a strong side, making 11 changes in the team that conquered last Thursday Pool A minnows Russia at Kobe.
The yield of Henshaw, that has been restricted to just two international looks so far this year, as a timely boost for Ireland who will expect the 26-year-old can have an effect similar to the one he had in Irelands closing warm-up win over Wales in September.
Captain Rory Best, Cian Healy and Tadhg Furlongs first choice front all reunite as to Iain Henderson along with duo James Ryan.
While still Jack Carty is absent from the match-day 23 for the very first 42, the only two Ireland gamers to have started every one of their matches so far in the tournament, Peter OMahony and garry Ringrose, are comfortable.
The cancellation of New Zealands final group game against Italy means Ireland know for certain that, should they advance to the quarter-finals as bunch runners-up, theyll confront the All Blacks.
Typhoon Hagibis, which has wreak havoc on the final weekend at the pool point, has already forced two and could yet mean Sundays meeting between Scotland and Japan being called off.
In any scenario, Japan understand they will top the group if they collect a few points from their match, regardless of Irelands result against Samoa.
Past 19, Japan ended in a defeat samoa odds of progressing to the knock-out stages.
Steve Jackson makes just two changes with Logovii Mulipola and Teofilo Paulo coming in to the pack, to their match in Fukuoka.
Before allowing their opponents to dominate the game against Scotland and Japan, Samoa have put.
Ireland: Larmour, Earls, Henshaw Stockdale Murray; Healy Furlong, Henderson, James Ryan; Stander, Beirne der Flier.
Replacements: Scannell Porter, Kleyn, OMahony, McGrath, Carbery, Conway.
Samoa: Nanai-Williams; Tuala, Leiua Fidow Polataivao; Mulipola, S Lam Alaalatoa, Paulo, Leaupepe; Vui, Ioane, J Lam.
Replacements: Niuia Lay, Faasalele, Tyrell, Cowley, Pisi, Fonotia.