The Boston Celtics won their show-and-prove matchup last week against the previously unbeaten Cleveland Cavaliers.

Teams are competing and not blatantly exercising organizational priorities, and in a culture where we’re waiting for the next “trades we want to see” piece to drop, I like that NBA Cup games take place just after the glorified feel-out games that mark the opening weeks of the season and wrap up just before all of those new contracts become tradeable.

The Rockets see the biggest climb in these Power Rankings. They've been terrific defensively, led by Ime Udoka's approach of switching heavily while keeping Alperen Sengun stationed near the basket. Tari Eason has exploded into an All-Defensive candidate.

With the first five weeks of the season in the books, our latest NBA power rankings reveal who the 10 best and 10 worst NBA teams right now.

The Jazz snapped a four-game losing streak with a win over the Knicks. Lauri Markkenen went off for 34 points. Collin Sexton has also had a positive season. He could be traded to a contender. Meanwhile, Cody Williams has had an inconsistent start to his season.

The Cavaliers and Celtics hold the top spots in The Sacramento Bee’s NBA power rankings with the Golden State Warriors, Oklahoma City Thunder and Houston Rockets all sitting in the top five.