Finch exuded confidence ahead of his team's much-anticipated World Cup semi-final against England at Edgbaston on Thursday.
"Totally outplayed today, the way they had us 27 for three after 10 overs set the tone", Finch said after Australia's first loss in a World Cup semi-final.
However, experienced campaigner, Steve Smith and Alex Carey made sure the Men in Yellow remain alive in the game.
From the outset, England's pace attack of Chris Woakes and Jofra Archer delivered exactly what their captain Eoin Morgan would have wanted from them -removing skipper Aaron Finch, David Warner and Peter Handscomb to reduce the Australians to 14-3 inside 37 balls. We had to take our chances and bowl them out.
England openers Jason Roy, who hit 85 from 65 balls, and Jonny Bairstow, who made 34, took the game away from Australia with a superb 124-run partnership for the first wicket.
By the time Australia broke through, with Bairstow trapped lbw by Mitchell Starc, England were over half-way to their target with almost 32 overs remaining.
Speaking on the field, Morgan also praised the fans who roared England on to victory, marking their third triumph in a row after consecutive wins over India and the Black Caps pulled the hosts back from the brink of another early exit. It will be England's fourth World Cup final, and New Zealand's second, though neither team has won it.
In days to come the defeat might sting less, especially in light of where Australia's ODI form has been over the previous year, but Aaron Finch could not hide his disappointment.
"It sums up how far we have come in the last four years".
"So there was quite a drastic change in the way we played and the way we looked at playing our 50-over cricket". "World Cups are very special, they bring out the best in the best players, so I think that's why Australia have had a very rich history, winning four of the last five", Finch said on Wednesday.
England´s woeful first-round exit at the 2015 World Cup prompted a root-and-branch reform of their approach to one-day internationals for a side that had long placed Test success above all other considerations. "They will be a hard side to beat on Sunday, so we are looking forward to it".