Stand-in Australia coach Justin Langer says he is looking forward to seeing how his players perform under pressure ahead of their must-win clash with West Indies on Tuesday.

After their match against South Africa was abandoned due to rain, the Aussies need to beat the Windies to guarantee their spot in the final of the Tri-Series.

South Africa top the standings with 12 points, Australia a point behind with the Windies last with eight points - but a win for the home side could see them leapfrog Langer's side.

Langer admitted the extra pressure would weigh on Australia, but hopes to see a positive reaction from his players.

"All one-day internationals are pressure games, but certainly in this instance ... there's real pressure," the caretaker coach said. "It's game on.

"We haven't done ourselves any favours in a sense that we haven't got ourselves automatically into the final like we would have liked, so it's good to see guys under pressure.

"And this will be a little bit more pressure than a normal one-day international on Tuesday."

While new to the international stage, Langer has led teams into big matches before, having coached the Perth Scorchers to Big Bash League glory earlier this year.

And his approach to high-pressure games is simple: less is more.

"I always believe the harder you try, the worse it gets," he said.

"If we beat [the Windies it will be] on skill, not emotion, and not getting caught up in the actual game.

"Sometimes in big games what you tend to do is over-analyse it. You want everything to be perfect but often ... the less you can put in their mind, the more you can just let them go and play [the better].

"We don't have team meetings in Twenty20 cricket (with the Scorchers). We might have one or two dots up on the board.

"And people will talk about all this analysis of different oppositions. Well, I must be doing it wrong at the Scorchers, because we tend to go the opposite way. We want to simplify it, particularly for young minds.

"And for senior players, they've been there before. We don't need to complicate it for them. They've got their cues, they know their processes.

"So we'll just try and keep it as simple as possible and hopefully they can go out and play and enjoy the experience of playing at this magnificent ground."