WALTHAM — It’s still just five games into the season, but in a three-day span last week we saw the Celtics pushed to frustration in Indiana by a third straight loss, then showered with praise after beating Washington by 20 points.
It is the task of coach Brad Stevens to treat these two impostors the same.
“The hardest part about winning and losing is the emotions that come with it,” Stevens said before yesterday’s practice. “Being able to handle not only the negative emotions that come with losing, but being able to handle a win is just as difficult.