Ricky Ponting on Thursday hailed Steve Smith as "a genius" after his superb Ashes double hundred in Old Trafford Test.
Smith has taken his game to another level since returning from a ball-tampering ban in March earlier this year.
"You hear all sorts of words, 'genius' is one that comes to mind," Ponting told cricket.com.au when asked to sum up Smith's knock which put Australia in a commanding position.
"A remarkable innings again. It's his application to what he does. He just doesn't make any mistakes. His concentration levels are obviously unbelievably good."
Ponting, when asked about how he would get Smith out, said he would avoid attacking Smith's pads at any cost and insisted on challenging the outside edge of his bat.
"He's only been out nine times lbw in his last 99 innings, so you know if you're bowling straight you're not going to get him out," he said.
"The one thing you have to do is try and challenge the outside of his bat. He doesn't miss it on the inside."
Smith, who recently edged Virat Kohli to become top-ranked Test batsman in ICC rankings, is increasingly being compared to legendary Don Bradman.
"Even what Smithy is doing now is remarkable, to think how good Bradman must have been to be a third again better than what Steve Smith's doing at the moment is ridiculous," he said.