Erik Spoelstra's postgame comments cause for concern?

The "I don't know how we're going to get it done" part is brutally honest, considering he's essentially admitting to having the full understanding of how emotionally draining this loss was, not even factoring in the two losses prior.

As hard as winning each of the previous three games for the Celtics certainly had to be, the Heat finding a way to go back to Boston and win Game 7 now will almost certainly be tougher. Miami couldn't get virtually anything inside the arc to fall early in this game, and their 3-point shooting was really what bailed them out.

The Heat shot 46.7 percent from deep, while the Celtics finished the night at just 20 percent. Miami only shooting 35.5 percent from the field prevented them from ever having a shot to take the game over. The trio of Jimmy Butler, Bam Adebayo and Gabe Vincent made just 15-of-55 attempts on the night, and the only two other players who attempted more than 10 shots were Caleb Martin and Duncan Robinson, who both shot over 45 percent, with Martin going 7-of-13 from the field and 4-of-8 from 3-point range.

Regardless of how you look at Game 7, the momentum favoring the Celtics and the series being back in Boston are both massive factors. But the simple fact of how the Heat lost Game 6 in such heartbreaking fashion is enough to put a ton of faith behind the Celtics to win this series and advance to the NBA Finals.