Timberwolves coach Chris Finch was annoyed after just the second day of training camp.
So he made a decision for Day 3, the team's final full day of practice before it flew to Abu Dhabi for more than a week.
He would spend the entire practice on defense.
"We just did things over and over again until we felt right about what we were doing," Finch said. "Made a few tweaks, and it looked completely different. From that moment on, it's just been putting in practice and refining it as we went."
Since then, there have been few days Finch has been displeased with the defense.