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The Celtics veteran big man Al Horford (8 points) spoke after Boston’s 128-102 loss to the Miami Heat on Sunday night in Game 3 of the Eastern Conference title series.

Jayson Tatum scored 14 points and Jaylen Brown added 12 for the second-seeded Celtics, who won three times on Miami’s floor on the way to winning last season’s East finals.

“I obviously expected more from our group, and we just didn’t have it like we needed to,” Horford said after the G3 loss.