Former Scotland front-row Peter Wright has urged his country not to put everything on the Samoa fixture but also attack South Africa in their pool.
Vern Cotter's side, who face the Springboks and the Samoans in their final two matches of the group, kick-off their World Cup against Japan and then the USA.
And with a full week separating their two key games, Wright wants them to put out their strongest available starting line-up for both pivotal pool fixtures.
"The good thing is the space between the games. They could potentially put their strongest team out three weeks in a row," he told BBC Sport on Monday.
"They play Japan first, which is probably the least physical but still a tough game, then it's America then South Africa and then Samoa. Everybody expects it to go down to that Samoa game (to clinch a last-eight slot).
"Though never in a World Cup, we have got history of beating South Africa so I'd be going all out to win that game.
"I wouldn't put everything on the Samoa match."
On who he thinks will progress, White added: "Scotland and South Africa (will go through).
"It's a tough group. There are three extremely physical games there for Scotland in South Africa, Samoa and the USA. They are going to have to front up physically in those three games.
"In years gone by, from Scotland's perspective, if we had America and Japan in our group we'd be thinking that's two guaranteed wins, but I don't think it is. These teams – and Tonga, Fiji and Argentina – are big threats to countries now."