Australia coach Justin Langer wants his fringe players to ensure they are ready to perform, but those hoping to replace Mitchell Starc and Pat Cummins will need to be content with riding the pine.
Australia secured their ticket to the semi-finals with an emphatic victory over England on Tuesday, giving them some breathing room for their final two group games against third-placed New Zealand on Saturday at Lord's and then underperformers South Africa in Manchester next week.
But Langer stressed the reigning 50-over champions won't take their foot off the gas and will likely follow the wishes of their star quicks by keeping them on the park for their final two group games.
"I don't think they would want to," the coach said when asked if the pair would rest.
"It is going to be one of the challenges for us. It is really nice to know we are in the semi-final. It's a really nervous time leading out to it because you can't win the final unless you are in the semi-final. "But I would be surprised if either of those guys rest up.
"The challenge is going to be that we have long layoffs now, a bit of a layoff here, then five or six days in Manchester, we have to manage that really well. So I don't think they will want to rest."
There had been concern over how their bowlers would pull up after playing four games and travelling nearly 700 kilometres in a gruelling nine-day stretch earlier in the tournament.
But, in the midst of a more spread-out finish to the group-stage in which they play their final three games in 15 days, Starc and Cummins both appear in good physical nick.
Australia are understandably wary of overcooking them given the duo have a key role to play in the five-Test Ashes series to follow.
The recalled Jason Behrendorff made a strong case to be the third seamer for the business end of the World Cup after a career-best international five-wicket haul to flatten England.
Off-spinner Nathan Lyon, in his first game of the tournament, was also commended for his frugal return even if he didn't claim a wicket.
But despite only losing one game all tournament, Australia have consistently mixed and matched their team and Langer urged the four players who missed out against England - Adam Zampa, Kane Richardson, Nathan Coulter-Nile and Shaun Marsh - to be prepared to play the Kiwis.
"Will Smith used to say 'always stay ready so I don't have to get ready'," Langer said. "And I've thought that for 10 years and that's been a big motto for us.
"You always stay ready and that's the same for Zampa and Coulter-Nile and Kane Richardson and for Shaun Marsh who didn't play the last game and for every one of our players."
Langer took particular pride in the performance of Behrendroff, having mentored the left-arm quick during his time as Western Australia and Perth Scorchers coach before taking the national job.
"To come to England and bowl on the big stage as well as he did, it will be a great confidence boost for him. I think it's also a big confidence boost for the team," said Langer "I've seen it for a long time and we've seen him do it intermittently playing and not playing for Australia. We know he can do it, he is a very good athlete and he's an incredible professional so he will do everything possible to play.
"And he's a really nice person. So we see those sort of people get a reward is really pleasing."