Mitch Marsh is adamant David Warner will be able to put the fresh Sandpapergate revelations to one side and kick-start Australia's faltering T20 World Cup campaign.

Warner's central role in the ugly ball tampering affair of 2018 hit the spotlight again on Sunday when excerpts from Faf du Plessis' soon-to-be-released autobiography became public.

The former South Africa skipper details in his book how his team suspected Australian players were tampering with the ball several weeks before the cheating was exposed in Cape Town.

Du Plessis said South Africa players used binoculars in a bid to see what was happening, and they particularly focused on Warner given the ball often made its way to him.

The ball tampering, in which Cameron Bancroft used a piece of sandpaper to rough up one side of the ball before hiding the evidence in his underpants, was finally caught on camera in the third Test of the fiery series.

The release of the fresh revelations comes at the worst possible time for Australia, given their T20 World Cup title hopes are already on the ropes after Saturday's 89-run loss to New Zealand.

Australia will almost certainly need to win their remaining four pool matches — starting with Tuesday night's clash with Sri Lanka in Perth — in order to reach the semi-finals.

Warner made just five against New Zealand, but Marsh is adamant the 35-year-old won't be distracted by du Plessis' revelations.

"Anytime we've seen him with his back against the wall, he always stands up for us," Marsh said.

"What he does is amazing. He's been an incredible person to have around our group. He's a great leader.

"And he's just got so much energy. He's our unofficial team manager.

"He's had an amazing career and he's clearly been able to block out a lot of distractions throughout that, and that's what separates the best players in the world from the rest.