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Duke's defense was very disappointing in the team's two losses, giving up easy shots and opportunities to capitalize to the Wolfpack and Hurricanes.
The team was once known for its defense and was one of the toughest teams to beat on any given possession, but now that is history.
Duke gave up 84 and 90 points to NC State and Miami, respectively. This average of 87.0 points is 23.8 points higher than the team's season average of 63.2 (per Statsheet.com).
What's worse is that these instances weren't from opponents making tough shots, but they were from poor defensive effort.
North Carolina State shot 50.8 percent from the floor, including 50.0 percent from three. Miami then shot 56.9 percent from the field, and 47.4 percent from beyond the arc. That's an average of 53.8 percent from the floor and 48.1 percent from three.
Duke has to work on its defense in order to take down the best teams in the country once again.