The only Magpie remaining in the Super semifinals, Dagg, 26, said the Crusaders' intense training sessions during the past fortnight reflected the high disappointment levels experienced after that loss.
"Hopefully we can execute in the way we want. We've worked pretty hard on defence. Good defence and being well disciplined will get us the win ... we can do it," Dagg said.
He understood why a big emphasis had been placed on the battle of the packs, which had the potential to be a brutal affair.
"The boys have to do the hard work up front before we get the ball out wide. When we do it's important we treat the ball like gold otherwise the forwards will be grumpy," he said.
Dagg has plenty of respect for Sharks winger JP Pietersen and the versatile Patrick Lambie, who has been named at first five-eighth which forces Frans Steyn out to second five-eighth where he will mark Carter.
In another change, Sharks coach Jake White has replaced injured lock Anton Bresler with Willem Alberts and Jean Deysel replaces Albert at flanker. Deysel, on the bench in Durban last weekend, was red-carded for stamping on Jordan Taufua in Christchurch last time out.
"The Crusaders are a phenomenal team, we're under no illusions of how good they are and what they've achieved, but we just have to prepare as best we can to give ourselves a chance," White said.
"They have players in their team who won the Rugby World Cup a few years ago, they have guys who are consistently in playoff games, the team hasn't missed out on playoff rugby in a long time, and all these guys have been part and parcel of playoff games, so I have no doubt that with the team they have available ... they'll be a massive force."