The first Timberwolves practice of training camp, broadcast live on NBA TV, was devoted almost entirely to defense.

“We have to get better defensively,” Mitchell said. “And the only way you’re going to get better is to work on it.’’

• Former Wolves player Gary Trent has been brought on in a developmental role. Mitchell said he will work with the team’s big men.

• Assistant coach Ryan Saunders was at practice Tuesday. He has been told by the team to take whatever time off is necessary to see to his father.

• Rookie Karl Anthony Towns on his first NBA practice.

“Very intense,” he said. “One of those practices you’ve teen training your whole life for, condition-wise, body-wise, everything.’’