Cricket firebrand Mitchell Johnson doubles down on stunning David Warner swipe with new claims: 'My opinion is still valid'

David Warner's sparkling 164 against Pakistan in Perth has done nothing to change Mitchell Johnson's view that the Aussies should be looking to blood new players this summer.

Warner was the recipient of huge criticism from Johnson ahead of the Test summer, with Australia's Ashes hero claiming the opener is not deserving of a farewell party due to his poor form and role in the sandpaper scandal.

But Warner hit back in the best way possible at Optus Stadium and celebrated by putting his hand to his mouth in what some fans felt was a dig at Johnson.

In a follow-up column on Saturday night, Johnson has stood by his earlier claims.

'I think my opinion in this column a couple of weeks ago is still valid. He hadn't scored runs in about three years apart from the double century last summer,' Johnson wrote in the West Australian.

'Another point made was that a soft summer like this, with Australia expected to comfortably beat Pakistan and the West Indies, was the perfect time to look at blooding some new players into an ageing team.

'They could have given some new guys some really good time out in the middle this summer and backed them in. That's going to be much harder across the next two summers when India and England visit for five-Test series.

'It seems they've got their own plans in place for selection and how they see things. But they are going to be confronted by a changing of the guard at some point soon.

'David Warner's century on the first day of the Australian Test summer was no great surprise in some ways.

'There was a big media spotlight on Warner and his form and he seems to be at his most motivated when backed into a corner and he generally saves his best for home soil.

'On day one Warner rode his luck early on — and it could have gone either way — and you take that and he went on to make 164.

'He did what he was paid to do in the first innings before Saturday's duck in the second innings.

'Warner may have denied he cares about criticism of his form, but it definitely does drive him as shown in his performance in the first innings.

'That sort of atmosphere is something Warner revels in and he is a bit like Kevin Pietersen was in that regard.'

Channel 7 savagely stitched Johnson up as the former fast bowler was forced to watch the David Warner show in the first day of the Perth Test.

Johnson was on commentary duty for Triple M at Optus Stadium, and as Warner hit a shot for four, the Channel 7 camera panned to the former paceman watching on from the commentary position.

Johnson wore a wry smile after seeing Warner execute the shot.

'Mitchell Johnson looked as though he liked it. From a radio box not too far from here. Interesting lead up to the match,' Tim Lane said on Channel 7's coverage.