Even when the Heat and Celtics aren’t facing off in a contentious regular-season game or a vicious playoff series, their distaste for one another continues. On Friday, Heat president Pat Riley and LeBron James fired back at Danny Ainge after the Celtics’ president of basketball operations called James’s complaint of hard fouls in a recent game “embarrassing.” James told reporters in New Orleans, “I’m not surprised to hear anything from Boston.” Riley was a bit more forceful in his comments, which were released through a team spokesman. “He needs to shut the [expletive] up and manage his own team,” Riley said. “He was the biggest whiner going when he was playing. I know that because I coached against him.”