Ashwin was highly impressed with Pat Cummins's 'tactical masterclass' in the final.
The left-arm wrist spinner said dealing with the setback was tough.
Upset by India's defeat in the final, Kaif had said Australia were not the best at the World Cup.
The Australian skipper touched down in Sydney with teammates and was still glowing about their achievement.
The real challenge for India was always going to be how they fared in the knockouts. They cleared the semifinal hurdle unlike in 2015 and 2019. But on the big day, Australia were right on the money while the Indians had a game to forget.
The Indian head coach was tight-lipped about his future.
The South African players came out of the semifinal defeat with their heads held high.
The Indian skipper said the surface got better to bat under lights without using it as an excuse for their poor show in the final.
Head became the third Australian after Ricky Ponting and Adam Gilchrist to score a ton in a World Cup final.
'We understand the importance of what Australia can do. They are a very complete side,' said the Indian captain on the eve of the World Cup final.