What happened: After carrying a 96-80 cushion into the fourth quarter of their regular-season home opener, the Cleveland Cavaliers saw their advantage cut to 108-97 with 7:08 left. The Brooklyn Nets then surged on a 22-7 run over the last four minutes to trim the margin to 120-116 with 26.4 seconds remaining before making it a two-point game inside the final eight seconds.

Why it matters: True title contenders close out double-digit fourth-quarter leads at home instead of allowing opponents to score 41 points in the final period. Letting Brooklyn turn a comfortable rout into a one-possession scramble exposes glaring late-game defensive lapses for Cleveland.