Buckley said his side was "beaten in most areas" on Saturday and were simply out-worked by the Power around the contest.
Port last beat Collingwood in Adelaide in round six of its 2004 premiership year.
A number of players were shown up in the loss, he said, and with a handful of stars nearing match fitness, selection changes are on the cards.
"Obviously there were some players tonight that had their colours lowered and if that happens too consistently then clearly selection needs to come into play," Buckley said.
Vote for your 3-2-1 from Collingwood's loss to the Power and help decide the Magpie Army Player of the Year Award.
"We expect to get (Dayne) Beams and (Tyson) Goldsack back into match play next week.
"Our VFL had a win earlier this afternoon, Andrew Krakouer, Clinton Young and Lachie Keeffe were a few boys who performed pretty well.
"There's four or five there that are up and about and ready to come in."
Buckley described the pressure asserted on his side as "finals-like" in the 37-point defeat.
He insisted his team appreciated the threat of the Power, who he predicted would enjoy a bright future playing the style of football they executed on Saturday night.
"They were definitely harder than us, they were able to work harder to outnumber (us) at the contest," he said.
"A minus 15 contested possession tells you that – we don't accept that and we're not happy with it.
"That young side will win a lot of games, the way the game was played tonight, that's modern footy.
"We were beaten by a side that was cleaner than us, that used the ball better, that made better decisions.
"We saw modern footy played pretty well [by] a side that knocked over the reigning premiers last week and they've shown they've got the capacity and the belief in their style of play to be able to do it consistently."
