Blues captain captain Keven Mealamu blamed his team's poor execution and errors for their 23-29 loss to the Sharks.
The Blues have now lost six of their seven Super Rugby matches this year and are almost certainly out of the play offs.
Mealamu said his players were stringing together some good phases of play but letting themselves down with poor execution.
"Two intercept tries," lamented Mealamu.
"That's 14 gift points and against a team like the Sharks that's too many points."
"The boys are really trying hard out there but those little things really cost us," he said.
"You just can't play in this competition with that many errors."
Sharks captain and try scorer Keegan Daniel said he was heartened by the Sharks improved defence after they let six tries in last week against the Hurricanes.
The Sharks ended their tour with 11 points after victories over the Blues and Brumbies but losses against the Hurricanes and Waratahs with a bonus point.
"We haven't been very consistent on the trip but to come to the home of rugby and get five points, we're very happy with that," said Daniel.
"We had to defend most of the half and that's been one of downfalls," explained Daniel.
"I'm proud of the way the boys defended and at the end of the day we scored four tries and scored the bonus point so I'm happy with that," said Daniel.