The score was 8-3 to the Chiefs at the time thanks to Bundee Aki's well-taken try in the right corner, but it was the Blues who looked stronger immediately after Barrett's exit.
It ramped up the intensity in a match with plenty of feeling - this was a derby in every sense - with fullback Charles Piutau scoring an excellent try from Baden Kerr's kick through the defence.
Strangely, too, although the Chiefs' scrum was dominant and became increasingly so, which wasn't surprising given the immense bulk of Ben Tameifuna at tighthead prop, the Blues weren't embarrassed in this area, although Hika Elliot's try from a rolling maul owed much to a good scrum and mistake by Blues halfback Piri Weepu.
While the Chiefs had the New Zealand conference sewn up before kick-off, they still had plenty to play for. This was no dead rubber. Not only did they need the victory in order to help their chances of finishing on top of the table, they had to draw a line under their last performance against the Crusaders in Christchurch - one lacking in passion, and in many cases, common sense. The six changes Rennie made following that loss was a sign of his displeasure, but the expected reaction wasn't forthcoming.
The Kerr sinbinning for a deliberate knock-down of a Liam Messam pass was unfortunate, a situation the Blues first-five found himself in after scrambling back from an intercepted Anthony Boric pass. The home crowd of 25,000 believed most of the decisions were going against their team.
In the finish this was an end-to-end thriller in doubt until full-time, although Aaron Cruden's poor goalkicking - he missed all four conversions - did the Blues a favour.
In many respects it was the Blues who made the bolder statement. After five straight losses and a trip home from South Africa, their performance spoke volumes about how far they have come this season.
For the Chiefs it will be a reminder that they still have a fair way to go. APNZ
