At least Game 4 put a little extra fire into the Celtics-76ers rivalry

Philadelphia 76ers' Joel Embiid, left, and Boston Celtics' Marcus Morris argue during the second half of Game 4.So this is how a classic rivalry is renewed, folks.

With a team down three games to one in a series carrying itself with the brashness of a team up 3-1 and the inevitable just ahead.

With the home team’s refusal to release the usual post-victory confetti from the rafters, as if there will be another opportunity to let it float and fall later in the series.

With a brief confrontation between opposing players carrying the ominous edge of something that was a swing away from turning to chaos.

With familiarity turning opponents once admired into enemies despised.

The Philadelphia 76ers…