This is what I done on Bet365 at the moment, could change between now and the World Cup...
Group A: Netherlands, Senegal, Ecuador, Qatar
Group B: England, USA, Wales, Iran
Group C: Argentina, Mexico, Poland, Saudi
Group D: France, Denmark, Australia, Tunisia
Group E: Spain, Germany, Japan, Costa Rica
Group F: Belgium, Croatia, Canada, Morocco
Group G: Brazil, Serbia, Cameroon, Switzerland
Group H: Uruguay, Korea, Ghana, Portugal
Round of 16:
Netherlands beat USA
Argentina beat Denmark
Spain beat Croatia
Brazil beat Korea
England beat Senegal
France beat Mexico
Germany beat Belgium
Uruguay beat Serbia
Quarter Finals:
Argentina beat Netherlands
Brazil beat Spain
France beat England
Germany beat Uruguay
Semis:
Argentina beat Brazil
Germany beat France
Final:
Argentina beat Germany