First up is Argentina against Namibia and Pumas full-back Lucas Amorosino looks a good even-money shot for a try with an expansive approach likely to be taken.
Argentina have claimed try-bonus wins over Georgia and Tonga in stylish not just powerful fashion and the South West Africans are unlikely to have much in the tank after Tuesday's thriller with Georgia.
Italy against Romania promises to be a tight, forward-orientated battle for third spot in Pool D and it will be interesting to see how both sides cope without their skippers and other senior players because of injury and suspension.
The Azzurri should prevail but it could need one moment of magic to fell the Oaks and sniping scrum-half Edoardo Gori may be its provider at 4-1.
France have won all three past World Cup meetings with Ireland.
Ireland have won the teams' last two Six Nations battles narrowly.
All is set for a crunch if not classic clash in Cardiff for top spot in Pool D and a quarter-final with Argentina not New Zealand.
Jonny Sexton, fired up by hints of midweek trash-talking from the French camp, should put the Ireland pack in the right places to prosper and backrower Sean O'Brien, 11-2 for a try, loves to get involved in rolling mauls. He also appears on the shoulders of midfield breaks.
The finale is Japan v USA and while the Brave Blossoms are guaranteed third place in Pool B and a berth in the next World Cup, they should put on another fine show with skipper Michael Leitch leading from the front.
The Eagles bring back most of the men rested for the midweek mauling by South Africa but they are honest toilers at best and are unlikely to cope with Japan's energetic approach, particularly in the forwards. Backrower Leitch is normally at the heart of Japan's rolling maul and he can touch down at 7-2.