Warner is hoping to call time on an illustrious Test career after Australia faces Pakistan on his home deck at the SCG in the third and final match of the series that begins in Perth next week.

But in a newspaper column at the weekend, Johnson questioned whether Warner had been in strong enough form to set his own retirement date and opened up old wounds by referencing his role in the "Sandpapergate" ball-tampering saga.

The extent of Johnson's critique, which included suggesting that "Bunnings would sell out of sandpaper", has brought criticism but Warner himself laughed the comments off as he addressed them for the first time.

"It wouldn't be a summer without a headline, would it?" he said at the launch of Fox Cricket's summer coverage in Parramatta on Friday. "It is what it is. Everyone's entitled to their own opinions. Moving forward, we're looking forward to a nice Test over in the west."

Australian selectors have stuck by Warner amid the lean stretch, which has admittedly featured two dismissals in the 90s, and are in the midst of determining his replacement beyond Sydney. The playing group has been just as supportive in recent days.

"I think we protect each other a lot," Cummins said. "We've been through a lot over the years, our boys. Someone like Davey or Steve [Smith], I've played with them for a dozen years now so we're fiercely protective of each other.

"Sometimes you've got to remind yourself of the amount of positive support that is out there."

Warner, focused on ending his career on a high, said he learned long ago to knuckle down in the face of criticism like Johnson's.

"My parents ingrained that into me," he said. "They taught me every day to fight and work hard. When you go onto the world stage and you don't realise what comes with that, it's a lot of media, a lot of criticism but a lot of positive.

"I think what's more important is what you see here today, the people coming out to support cricket."

"We've had arguably our most successful year ever. We're going into a really exciting summer," Cummins said. "There's so many positive things around Australian cricket I think we should be talking about and we're focusing on that [Johnson's column]."