NBA Power Rankings: Is it time to worry about the Cleveland Cavaliers?

NBA Power Rankings: At what point do we worry about the Cleveland Cavaliers

CLEVELAND, OH - NOVEMBER 07: Head coach Tyronn Lue of the Cleveland Cavaliers talks to Dwyane Wade #9 while playing the Milwaukee Bucks at Quicken Loans Arena on November 7, 2017 in Cleveland, Ohio. Cleveland won the game 124-119. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Gregory Shamus/Getty Images) /

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BOSTON, MA – OCTOBER 2: Kyrie Irving #11 of the Boston Celtics and Gordon Hayward #20 look on during the first half against the Charlotte Hornets at TD Garden on October 2, 2017 in Boston, Massachusetts. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Maddie Meyer/Getty Images) /

1. Boston Celtics

It’s not exactly surprising that the Boston Celtics have the best record in the NBA. No, what’s surprising is the fact that they tout the league’s best defense.

After adding Kyrie Irving and losing Avery Bradley and Jae Crowder in the offseason spelled a likely better offense for Boston, but at the same time a worse defense. You’d think. However, through roughly the first month of the season the Celtics have the No. 1 ranked defense.

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If this is sustainable for the Celtics, they’re here to stay. Even without Gordon Hayward.