Warren Gatland's side came agonisingly close to upsetting defending champions South Africa in their opening game before losing 17-16.
But they will have to put that disappointment behind them when they tackle their previous RWC nemesis Samoa, who beat them in the 1991 and 1999 pool stages.
Gatland has made one change on the bench, with Cardiff Blues prop Gethin Jenkins having shaken off a calf injury to replace Ryan Bevington.
"We were extremely disappointed to lose last week against the Springboks, but we did maintain momentum with aspects of the performance providing a host of positive points to take into Sunday's match against Samoa," said Gatland.
"We have re-grouped and the players are looking forward to getting back out on the pitch to largely pick up where they left off last weekend.
"There are one or two areas we know we need to work on but we are looking for much of the same from all involved.
"We could not fault the effort, passion and commitment of the players last week and we have simply said we are looking for the same again against Samoa on Sunday."
Wales: 15 James Hook, 14 George North, 13 Jonathan Davies, 12 Jamie Roberts, 11 Shane Williams, 10 Rhys Priestland, 9 Mike Phillips, 1 Paul James, 2 Huw Bennett, 3 Adam Jones, 4 Luke Charteris, 5 Alun Wyn Jones, 6 Dan Lydiate, 7 Sam Warburton (capt), 8 Toby Faletau.Replacements: 16 Lloyd Burns, 17 Gethin Jenkins, 18 Bradley Davies, 19 Andy Powell, 20 Tavis Knoyle, 21 Scott Williams, 22 Leigh Halfpenny.
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