The duality of the Celtics’ defense

For the majority of the season, the Boston Celtics have looked like the best team in basketball. But as was the case at the start of last season, they routinely slide backward, falling into bad habits and suffering embarrassing losses. Both versions of the Celtics’ defense were on full display in the span of just three days.

On Tuesday, the Celtics lost to the Oklahoma City Thunder 150-117. It was their worst showing of the season, as Boston failed to deliver any semblance of energy, allowing the Thunder to set a franchise record in points.

Two days later, they stomped the Dallas Mavericks, earning a 124-95 victory. Jayson Tatum recorded the second triple-double of his career, and the Celtics…