As well as the Celtics shot the ball in Saturday night’s win in Miami, by Monday night Brad Stevens no longer carried the smile that can only come from such a major upset. Instead, he was back to dissecting what he considered substandard defense. “You’re probably asking the wrong person right now,” he said to a question about the Celtics’ high ranking on several of the league’s defensive charts. There was no disputing how well the Celtics shot against the Heat, though, and they even went north of their 51.7 percent performance in their 120-105 win over Orlando. The Celtics marked their fourth straight win – a shock to NBA expectations – by shooting a season-high 60 percent. Virtually no one, save for Gerald Wallace, who missed the only shot he attempted, went hungry. But of rising importance on this team is the backcourt combination of Avery Bradley and Jordan Crawford. Crawford went for his first double-double as a Celtic with 16 points and 10 assists, to go along with five rebounds. And Bradley, moved increasingly into the shooting guard role, broke the sky open with a 24-point performance on 10-for-15 shooting. Bradley, moved primarily into a shooting guard role during the three-game losing streak that led into tonight’s game, has been increasingly fluid not only with his jumper, but also general movement away from the ball.