Why are the reigning champion Boston Celtics 7-7 in their last games? You can point to plenty of stats, from a dip in 3-point percentage to the alarming net rating of the starting five. But after arguably their worst loss of the season Wednesday night — a 110-97 defeat to the 9-31 Toronto Raptors — Kristaps Porzingis pointed to something stats can’t measure.

The Celtics mustered just 15 points in the fourth quarter of their loss to the Toronto Raptors on Wednesday night. Top scorer Jayson Tatum did not even attempt a field goal in the entire frame. That development was just one of several concerning signs that Boston was out of sync in their 110-97 defeat at Scotiabank Arena.

Two short weeks after losing by 54 points in Boston, the Toronto Raptors handed the Celtics their most humbling loss of the season.