"You put your shoulders and arms around his legs and put him on the ground," Blackadder said. "I thought the Waratahs gave us a real insight into how to shut him down. You just have to get up and knock him over."
Joseph has replaced Smith at the back with Trent Renata and, interestingly, has decided on Hayden Parker ahead of Lima Sopoaga at first-five. Sopoaga didn't have a good start against the Crusaders in Dunedin but is a much better attacking threat than Parker.
The Highlanders, in fourth place overall and almost certain to have a place in the playoffs, could win the New Zealand conference if they beat the Crusaders with a bonus point.
In another injury blow, prop Ma'afu Fia was ruled out after suffering a recent seizure for which he is undergoing tests.
Whitelock's inclusion is the only change to the Crusaders team which beat the Blues last weekend.
Blackadder said: "We're going to have to put in the performance of the season to come out on top, and that is exactly what the team has committed to doing."
Crusaders v Highlanders
Christchurch, 7.35pm tomorrow
Israel Dagg
Kieron Fonotia
Ryan Crotty
Dan Carter
Nemani Nadolo
Colin Slade
Andy Ellis
Kieran Read (c)
Matt Todd
Jordan Taufua
Sam Whitelock
Dominic Bird
Owen Franks
Ben Funnell
Wyatt Crockett
Trent Renata
Richard Buckman
Malakai Fekitoa
Shaun Treeby
Patrick Osborne
Hayden Parker
Aaron Smith
Nasi Manu (c)
Shane Christie
Elliot Dixon
Joe Wheeler
Tom Franklin
Chris King
Liam Coltman
Kane Hames
Reserves:
Crusaders: Corey Flynn, Joe Moody, Nepo Laulala, Jimmy Tupou, Luke Whitelock, Willi Heinz, Tom Taylor, Johnny McNicholl.
Highlanders: Ged Robinson, Matias Diaz, JP Koen, Josh Bekhuis, Gareth Evans, Fumiaki Tanaka, Lima Sopoaga, Phil Burleigh.