Kobe, Japan, Oct 2, 2019 (AFP) -Greig Laidlaw has urged Scotland to use their victory over Samoa as a model for the rest of their "must-win" campaign at the Rugby World Cup.

The Scots' 34-0 defeat of the Pacific islanders in Kobe on Monday saw them bounce back from a woeful 27-3 loss to Ireland in their opening match of a tightly contested Pool A.

They face minnows Russia, who play Ireland on Thursday, on October 9 before finishing the group stage against tournament hosts Japan -- who stunned Ireland 19-12 last weekend -- four days later.

Realistically, Scotland now need to win three matches in a row for the first time at a World Cup since 1999 if they are to reach the quarter-finals.

"It was definitely up there in terms of complete performances," Scotland scrum-half Laidlaw told reporters on Wednesday as he reflected on the bonus-point success over Samoa.

"We didn't score too early in the game, but the way we stuck to what we were doing, putting Samoa under pressure with our kicking game and our defence. That was the pleasing thing. We didn't try to chase the game too early.

"That was the message but it is one thing talking about it and another thing executing it. We need to use that model going forward for the rest of the tournament."

And Laidlaw said Scotland could not afford to let-up.

"We knew the circumstances (against Samoa) and that if we didn't perform, we were packing our bags and going home. But we have to step it up again now.

"We are still in the same situation where we need to win every game."

- 'Nail that game' -

Laidlaw said that meant concentrating on the task at hand against Russia rather than worrying too much about a possible 'winner takes all' clash with Japan.

"We can't look past that (Russia). We've got to really nail that game and if we do nail it then we'll take the momentum of two good games into the last match against Japan."

Scotland's four-day turnaround mirrors that which confronted Japan after their 'Miracle of Brighton' victory over South Africa at the 2015 World Cup that saw them beaten 45-10 by the Scots in their next pool match.

Laidlaw, asked if such brief gaps between physically demanding Tests were fair, replied: "I think if we were on the Japanese side then of course we'd be happier with their turnaround.

"But we've known about this for a long time and have prepared with the strength and conditioning staff, the physios and the coaches so the boys know what's coming."

Russia may be ranked 20th in the world, compared to Scotland's ninth and they have yet to win a match at this World Cup following 30-10 and 34-9 defeats by Japan and Samoa respectively.

Nevertheless, Laidlaw insisted: "Russia have been good so far in this tournament. Everyone has been impressed by them and so have we.

"Their set-piece has been excellent. Their scrummaging, they are obviously strong there. Just the general way they've gone about their business, they've come to enjoy themselves and play rugby and that's really shone through in their performances."