Dylan Larkin scored, and Nedeljkovic made 27 saves for the Red Wings (8-9-3), who were 0-3-1 on a four-game road trip (outscored 17-8).
"I think we consciously tried to be better defensively, we were better in some areas defensively, but you got to find a way to score that next goal and make it to 2-0 without giving anything up," Blashill said. "We've got to find a way to sustain pressure without taking on needed risk."
Larkin gave Detroit a 1-0 lead at 8:41 of the first period on a short breakaway set up by Lucas Raymond's lead pass from the neutral zone. Larkin has seven points (five goals, two assists) during a five-game point streak.
"I liked our swagger starting the season, we played hard and we played confident, but this road trip we haven't been confident, and you saw that tonight," Larkin said. "With a one-goal lead (in the third period), we've got to be a more confident hockey team."
Detroit had an opportunity to extend the lead during two power plays 36 seconds apart in the second period, but couldn't convert.
"I thought we had some good looks, we hit some posts, but we just didn't capitalize," Larkin said. "We've got to capitalize and close that one out."