Source: Michael Wallace, ESPN 
“It’s simple,” James said as the Heat prepared for Tuesday’s home game against the Milwaukee Bucks. “These first seven games, we’re playing like s— defensively. It’s that simple. We’re not a sugarcoat team. We came in and got right down to it. We’re terrible on defense, and we’ve got to change that.”
James’ comments came on the heels of the Heat’s 111-110 loss Saturday to the Boston Celtics, who won on a buzzer-beating 3-pointer by Jeff Green after overcoming a four-point deficit in the final 3.6 seconds. The shot from Green capped a relentless performance by the Celtics, who took advantage of Miami’s lethargic defensive effort throughout the game.
It’s already developing into a disturbing trend for the Heat, who are ranked first in the league in offensive efficiency but just 25th among the NBA’s 30 teams in defensive efficiency.