Clarke arrived in Sydney on Wednesday after the team's thumping 2-0 Test loss to Pakistan in the United Arab Emirates to a barrage of questions over whether he remained the best man to head the side.
Ponting said Clarke, despite battling a form slump, remained his pick as captain.
"I think that was quite ridiculous, to tell you the truth," he said of the grilling Clarke received, as the three former captains gathered to mark 100 days before the start of the 2015 World Cup, to be co-hosted by Australia and New Zealand.
"We know that out of the last couple of weeks the guys didn't handle the conditions that well over there (in the UAE) but... It's two Test matches, a bit of a blip on what's otherwise been a pretty good copybook for the last couple of years.
"So hopefully they can learn from their mistakes over the last couple of weeks, move on and be a better team in Asia for coming tournaments."
