MELBOURNE (Reuters) - Canterbury Crusaders coach Rob Penney says the embattled Super Rugby Pacific champions can still extend their dynasty by another year as they brace for a tough home clash against the second-placed Waikato Chiefs on Friday.

Winless in the opening five rounds, the Crusaders lie bottom of the table, with captain and experienced midfielder David Havili sidelined due to a calf injury in the team's latest injury blow.